This is my thought too. I'm on my 5th pack through my Gen 8 & it's still all stock, including the foams. The foams have broken down & are ok. The steering is fine for crawling. It turns pretty tight in the rocks & the stock servo is hanging in there, but a little slow. My initial plan was to modify the steering first thing, but after driving it a bunch, I don't feel the need yet. My first upgrade will probably be wheels & foams. I actually like the tires. They do pretty well on our Arizona rocks.
I like the tires too. I felt they did a great job on my Gen7, and now with proper foams in the Gen8, I feel the same way. Unfortunately, with our Vermont temps, there's just no way that those concrete memory foams were going to break down at all, so they had to go before I even drove the truck.
Like you, I'm also planning on getting some new wheels.