[snip]
Difficulty will pick up. Don't worry about that. In the meantime. If you mine, you earn rewards / fees. Just like always. If you mine with too much power, you'll mine less efficient. Just like always.
The fact that the network generates a few more blocks evey now and then doesn't really hurt you, does it? ;-) See it as a temporary extra insentive for miners if you will.
I disagree with you if the difficulty retarget is not properly adjusted and there is huge power, the fight for blocks can fork the chain and you discover a lot of blocks that stall and are not confirmed... so a lot of mining power wasted.....
But at the moment the bad thing about TGC is that we don't have an exchange......