I feel that it is absolutely worth transitioning through quicker classes in stages. If you're driving mod there's an expectation that you'll be driving faster than any other existing class as you'll have boosted esc settings and likely a low wind motor. Mod cars are a heap of fun however errors at that speed can be catastrophic. Parts wear out quicker under the heavier load as well so keep that in mind. Basically everything is turned up a few notches!