Depends on what you expecting from currency. if you want long-term coin to work all around world with people able to mine it (dont forget, mining not a goal! mining = supporting its work with reward for it) with GPU or CPU with almost the same reward - stay with MRC. If you want to pump/dump in few days/weeks and forget about it - its not MRC.
About exchange - ALL of us wish we wont late with BTC or LTC, yes? And mine something to use even with low speed CPU. So, MRC gives this possibility. So, it will hit exchanges for sure. @MRC soon start working on it for sure.
UPD lol i typing too slow but my opinion more objective