I acutually have many problems with ME3. Some are little things and some are big things. Like I'm not a fan of the click npc and stand around or run in circles while they all talk to each other thing personally. Im much more into the whole chatting thing via the dialogue wheel. (But that's just a preference. I also wish they had kept Mordins original VA)
Most problems in ME3 can be boiled down to a poor framework left in ME2. ME3 starts with you under house arrest after a bit of a time skip. So you are instantly dropped off into a situation that you dont really know whats going on with people around you that you have relationships with that you dont really know. Then instantly its all "we need to save earth".. because reasons.. like I get it.. saving Earth is important.. but it's mostly marketting. "Take Back Earth!". Earth isn't important when it comes to stopping the reapers. Then you have to get to mars because the Prothean Archives are bigger than originally thought (because reasons) and they think there are some plans for a superweapon left by the protehans (maybe?). It's an asspull. The entire crucible thing is just thrown in there because they had nothing set up from the previous games. Don't get me wrong, the writers did great considering they had written themselves into a corner, but it's a hell of a lot worse than it could have been.
The Mass Effect Trilogy will always be known to me as a trilogy that only scratched it's potential. I eagerly wait a remake of the series with a lot of these problems ironed out.
Do it. If people want to pay high prices for brand new video games, let them pay it. I'll just do what I've always done; wait for a sale.