One thing they don't need is duplicate the styles the other brands are using. You can already get those styles. I'm looking forward to them coming out with more American cars. Caddy's, Dooley's, ZZtop roadsters(this should be a must), Camaro's, Corvettes, Hummers, Tahoe's, etc... That's what they need to be working on. The kid kits are fine, just as long as they don't forget about the dads.
And another thing: ZZ's have more realistic body designs. Ms's and Bits are more cartoonish.