Well at least the Catalyst is nice, filling your head with happy pictures of victory after you pick control or synthesis.
All this might've worked pre-EC, but it doesn't anymore.
Post-EC is irrelevant.
EC is not the ending the Bioware devs planned.
EC is just fanservice, an attempt to salvage the relationship with their fans.
They will never admit IT was the original ending, because to do so would mean to not only make EC void, but to once again harm the relationship with the fans that weren't open minded enough to realise that the IT is correct.
There's just TOO MUCH PROOF for it to be false whereas the only think that ''debunks'' it is the EC, which, again, is not the planned ending but rather fanservice at the fan pressure. EC wouldn't have existed without the fans whining and as such cannot be realistically used in an argument against IT, which is an ORIGINAL ending and is independent of EC.