I don't understand why you want merge mining. If we can improve the difficulty adjust algorithm, security will be better. All the other independent coins don't have merge mining.
I'm not sure what merge mining has to do with independence. All coins are independent weather they are merge mined or not, you don't have to merge mine it, it's just another option that will bring in more miners & thus help secure the network & attract a wider user base, which is important if a coin is to become successful.
One question:
If merge-mining is enabled, everyone will do merge-mining or not? Otherwise he will lose money?
If so, once TRC merge-mined with BTC, huge mining power will be thrown on TRC. In this case, personal mining will be obsolete. P2Pool could also be obsolete if there's no one works on the merge-mining option of p2pool server.
We should allow user to use their low hash machine (e.g. < 1T) to mine TRC otherwise it will not gain interest from ordinary people or newbies.
I will not against it if it's most people's decision, and you all know the downside of merge-mining.