Hey Rich, thanks for all your hard work on the Ascender! I don't even have one yet but the 2.0 will be my next crawler as I've done a lot of research on the 1.0. Our family has an Ax10 mutt, Scx10 OG Honcho, and Scx10 ii Cherokee. I've been into hobby-grade RC for about 30 years now, and often find myself helping out n00bz on this and other forums, so I hope this collected list of responses to your questions may be helpful:
1. Torque Twist: Ideally adjust the rear upper link geometry, install a removable sway bar, perhaps outboard the shocks and/or include leaf springs? Or to quote New2rocks, "switching to cantilevers with the lower links mounted in the outer position within the lower mount brackets and the cantilever struts mounted outside of the lower mount brackets" and "if you can increase the gear reduction without making the pumpkin larger or impacting durability of the gearset, that would be a huge win." another plus with cantilever shocks would be the ability to run a full bed. Just don't make anything like Traxxas has patented or they'll put Horizon out of business via lawsuits like they're doing to Tower via Arrma.
2. Two-speed: assemble and provide a one-bag add-on kit with detailed instructions so as to avoid adding cost to the initial purchase.
3. Over/under drive: this is for anyone who wants a better turning radius (so basically everyone, especially those who realize that the Scx10 ii has an advantage in this department) and to be able to hold a line while climbing a hill without flipping over backwards (again, everyone); huge difference.
4. Upper Link mount: "(especially the rear) needs a third mounting bolt near the top by the links! I've got some stock plastic link mounts that are permanently bent more upright, the current mount on my Blazer allows so much flex that the rear axle rolls under and is about to tear the link mount off the axle! Several people have broken the two mounting screws that attach this link mount to the axle housing. The aluminum mount is nice, but does not solve the breakage issue without a third mounting screw.*Yeti.Stealth's extra screw through the link mount and axle housing has fixed this, but this should be incorporated into the RTR/kits... so that they don't flex and allow the axle to roll under on hard acceleration. Yeti-Stealth's thread starting about post # 57 in http://www.rccrawler.com/forum/showthread.php?t=576634" (Natedog). And as Hobbezco said, "The pumpkin needs to be beefier where the mount bolts in" since his clients have had lots of breaks there.
5. Driveshafts: folks who maintain thier vehicles will replace the pins during routine maintenance as they see them wearing (easier if a 2 pack of pins was sold separately - cred 2mtech), but these and others who destroy them every other run on brushless 6s are few and far between. Most peeps just run the stock electronics or similar, never have an issue, and therefore never crack open the axles. That being said, they would last longer using Gunnar's square-ended pins:
http://www.rccrawler.com/forum/axial-ax-10-scorpion/225932-gunnar-cvd-pins.html... as Natedog mentioned, since nobody likes to carry their rig home when they're out on the trail with friends (or alone, for that matter) and something breaks.
Additionally:
A. PLEASE make an inexpensive (sub-$200) kit version sans electronics, wheels, tires, and body; this would allow builders like those here on RCC and SBG to "roll their own", thus keeping your biggest fans and best modus of advertising (word of mouth/recommendation) happy.
B. Swap the tiny grub screws that love to either come loose or strip due to the loctite required to hold them in with larger pins that go all the way through. Larger-tool hardware in general would be appreciated, like the Scx10 ii went with.
C. Include HD links rather than soft alloy-minum.
D. To quote Nate again, "Shorter (maybe 10mm less?) shocks was mentioned by a few people here and single springs would be great too, less parts count, no spacer or second spring getting hung up on the threaded shock body that some have had problems with...
E. Raising front panhard bar would help stabilize on sidehills and increase side-hill ability. Moving rear suspension links can do the same for the rear of the truck."
F. Forward motor and center transfer case with changeable over/under-drive gears would be AMAZING!
G. The RTR should include plastic beadlock wheels worth metal rings and countersunk hardware; glue-on plastic wheels belong in the toy bin.
H. More of Natedog's ideas: "550 21T motor included instead of 540 35T motor...
I. Some smaller, more comp oriented bumpers that have internal ribbing laid out in such a way as to me 'trimmable' to different width/height profiles for different bodies. Stock Blazer bumpers are already this way in regards to height, but width-wise too would be great.
See Rockhugger Bumper Mods, starting with post # 737 of
http://www.rccrawler.com/forum/vaterra-ascender/538944-natedogs-vaterra-ascender.html
J. Replace multi-piece steering tie-rod with single link, move draglink to top of steering knuckle for even less bumpsteer (stock is virtually none) and stronger less flexible steering linkage. Post # 750 and 933 of
http://www.rccrawler.com/forum/vaterra-ascender/538944-natedogs-vaterra-ascender.html
PS K. Inner fenders on the RTR.