You know, the minute Shepard hit the atmosphere at the beginning of ME2 was when I knew I should throw realism right out the window. I don't care how good that suit is, the only thing that would have been left of Shepard after reentry is atomic vapor. (And yes, if you watch the cut scene closely, you do see Shepard falling into the planet. It has enough gravity to walk normally on also, so don't give me the "it's got low gravity" excuse.) It's hard to suspend the disbelief when I'm watching Shepard fall into a planet, only to be completely (with memory intact) two years later. Where the hell was his/her brain?
You also can't destroy a Mass Effect Relay with asteroids. I'm sorry. The Mu Relay (or however that's called) got blown out of position by an exploding sun. Any competent engineer would design the relay to be able to withstand impact from asteroids. They would. Why? Because asteroids would be one of the most common dangers, it's like designing a plane that can't take a bird strike. It's moronic. Yes, the asteroids were very large, but that's still not good enough. If they could not stand getting hit by asteroids, then it's likely the Mu Relay would have been destroyed when the sun exploded, or other Relays would have been destroyed when they were hit with other asteroids or the occasional moon. It happens. It happened to Earth, the Moon, Uranus, etc. If it can happen that often in one solar system... well, you think about that.
I'm a curious person, I like to know how things fit together. It's one of the reasons I read books, watch movies, and play video games. I don't like it when I'm told to "sit back and just accept". I can accept plot holes, really, I can, it's just that there are so many of them. I like Dragon Age II for crying out loud. But there I get to joke about "boneless women flopping through the streets" and all is forgiven. If Bioware let me be a sarcastic bastard with Shepard instead of a brick, I might like the game better. But it doesn't. It's story is unnecessary, it doesn't advance the overarching plot at all, it's the middle point of a trilogy that feels like busy work. It's why I haven't played any of the DLCs. I have to say, I'm not tickled at the idea of being told "you made these choices" when/if I play Mass Effect 3 (blew up the asteroid, helped Liara become the Shadow Broker) when I specifically chose not to pay for those DLC or play them.
Personally, I feel that if choices like you being on trial for blowing up a solar system, kick off the third game, they should be as a direct result of what you did in that game, not DLC. I should not have to buy or rent or borrow the godawful Mass Effect novels to find out who TIM is and why this Cerberus business supposedly makes sense. (It doesn't let's move on.) `
For the record, I don't want my Shepard to have helped Liara become the Shadow Broker. This game is supposedly about choice, I get where I have to fight the Reapers and the Collectors (not work with Cerberus) but why do I have to help Liara on her vengeance quest again? Even if I chose not to play it?