While I enjoy the gameplay of the MP, and the fact that it is cooperative rather than PvP, I am getting progressively discouraged with MP for the following reasons:
1) the randomness of the packs - I have been playing MP every day for the past 2 weeks (and on and off since the game came out) and I am still missing multiple characters (not just from resurgence pack) & haven't gotten any medigel in 2 weeks (with many vetran and spectre packs). I have shotguns (that I dont like to use because of the weight) coming out my ears & I have over 100 unnecessary ammo packs, etc, etc. I really wish there was an armory where you could buy what you want instead of getting random items I don't want.
2) The level 20 cap - There was no reason for this since the MP is only against AI. At least level 30 (or whatever it would take to max out a character's powers) would have been better. Heaven forbid that the characters were allowed to level up enough so that the average player could eventually play on gold without getting crushed.
3) The revive system - While this feature is useful in theory, it is often a double edged sword, since the enemies tend to linger at the down player - effectively making the downed player the bait for an enemy trap (even on bronze). Unless you missle said group of enemies, the player attempting the revive will often go down as well, & even if the revive is successful, you are often surrounded by enemies - and with low health, no shields, and obscured vision it is no surprise you go right back down. And how nice that the enemy will add insult to injury by stomping you to death.
4) Difficulty - one would think that silver would be managable with 4 level 20 players, but that is certainly not always the case. While player skill and class selection obviously play a part in this, I think that the curve is steep for the average player. At times, the enemies seem relentless, even on bronze.
While the easy answer is to simply not play or just play on bronze, these seem poor solutions for a game that was just fine without MP. Since Bioware felt the need to introduce this aspect to the series, they could have made it a bit more user friendly to the average player.