This makes more sense than, what Casey and Mac came up with in the ending. They harvest us to make this process safer with the use of Dark engery to help run their core. However, this process endangers the stars by aging them too quickly, which can cause whole suns to go supernova.
This really doesn't make any more sense than what was ultimately presented in ME3, and it would've led to an even more heavy-handed decision in the end involving the sacrifice of humanity or the potential extinction of all life. Not to mention that it's just another form of space magic.
As how I've stated why I feel differently for the most part in my clarification. I believe that topic for us now is concluded since we're not going to agree on it.
Ditto with the second: I feel ME3 is quite deserving of it's reputation, as is ME2 deserving of its own reputation.
I'd read through previous threads on the BSN---before ME3's release---before coming to a concrete frame of mind about ME2's "reputation". It has plenty of detractors from BW loyalists.
Also, ME3's general reputation outside the BSN is "great game, disappointing ending".
They both have their hardcore, nit-picky detractors, though. That's their reputation, and the reputation of BioWare's fans.