I think in both of our interests you as a vendor and my as an obsessive tragic is to find simple and clean solutions for the new tankers to come in and be able to have their own little backyard battles among friends.
A good basic configuration is above any metal tracked 390 equipped scale monster.
Without new people the hobby will die. How well we bring people in will effect whether it grows or dies.

I've seen any number of fantastic classes destroyed by fanatics. I took my 1/10th scale 235mm pan car out on a bicycle velodrome a few months ago and clocked over 90MP/H for 5 laps average. YO! but there is nowhere in this country that I can race that car anymore. It's a shelf queen and will always be. I threw about $100 in tyres and I couldn't say what the drivetrain cost but I only had that one chance. Getting access to an Olympic velodrome is not easy, you just can't show up and book a few hours believe me. Now the motor is in a Monster truck and the tyres will split and perish on the shelf.
Shame.
But,
What a HOOT!

Catering to the Full metal scale demon is fine but there is no growth and no excitement there.
I'd like to see some set, small scale scenarios that everyone drives and submit video for challenges.
Arena is X x Y and the obstacles are here, here and here and you do capture the flag. A standard layout with the variations by a roll of dice.
Such a magnificent platform, as I said it's closer to chess than RC but we can stretch into some incredible scale details and bring significant moments of history to life it cannot possibly have a down side.

I'm all for scale but I just bought another 2 Bulldogs and am going to do a Matt black with gold wheels and chrome features...
MadMax meets WWII.
JUST BECAUSE I CAN and that is why I do what I do.
I might even see that 40km/h from a tank.
2x 550 brushless and a steel geared box, plastic tracks, ball raced road wheels and sleeved idlers. That should do it. Add 4S2P 4Ah 16v pack and I'll either shred the tracks, not be able to control it and barrel roll or actually get to terminal velocity. Sounds like fun to me.
Yep, I'm not completely insane, but I'm trying my hardest.