kernel access helps devs to fine tune or maximize hardware potential.
It really is not a big deal in the short term. The biggest issue will be later down the road when updates are no longer release by Motorola. The phone will then be stuck on an older kernel. A new os or new features that require an updated kernel will not be usable.
If it wasn't for the unlocked bootloader in the D1, I don't think we would have seen Gingerbread roms.