I like MQ because:
We have huge mechs that blow things up.
Jobs to do on every planet.
a wide selection of weapons with varying effects
What could be done better:
More mechs/weapons in all categories (levels) so that players aren't stiffed cause they don't have a mech with that level.
With pirate-quest, you can lose money at a rate that overpowers everything you just did, even at level 30.
Warnings to tell you when you may need a certain class/require certain classes to do certain quests.
Newbatron trick needs to be put back in (I'm thinking of the lower levels here) and just set up wars with this new crappy scaling. Leave those who want to just battle for fun with low credits able to do so. (I don't do this, though, I just don't like the removal of it for two or 3 complainers)
Need more character work. Meaning in this case, revamp the energy sword fighting to more than 'spam the strong till you run out of energy, then spam attack'. Or release some cool guns.
What's just terrible:
So far, I haven't found much. My biggest pet peeve so far was that, while I know AE had a reason for it, they killed the Newbatron trick, which was quite helpful to newbies. In fact, I took my Newbatron all the way to level 12 cause there weren't any worthwhile mechs until then that I could afford so I saved my money after buying a level 8 Shining Electron Sniper until I was level 12 and could buy a house mech (when they came out, that was.) Needless to say, you try that these days and get your butt kicked. Instead of facing a level 1 or level 3 enemy, you face one that will tear you up like tissue paper.
Also, fix the rolls! Your random number generator is not random enough. It gives me consistently low rolls on everything. Damage, chance to critical, do the same job for 4 hours and go up one rank. My luck is currently at 130, and that's as much as I can go without retraining at level 30.
Again, another complaint: The stats do NOTHING. Or if they do anything, not enough. Nowhere near enough.
Some of the battles are a little lengthy, not from the hard battle, but the animations. Average animation time should be 0-2 seconds, not 3-7 (I'm talking to you, Desmodus), at least in my opinion, with specials able to take more time. I see no reason for shooting a gun to take longer than stabbing the guy with a laser sword. Nor a firework blast where the effects don't go away quickly enough.
However, compared to the other games:
MQ > AQW > DF > AQ
MQ is turn based and also moving in a theme I like.
AQW is a full MMORPG but AE wants too much to play it out of F2P.
DF is good, but getting money is hard and EXP even harder.
AQ is bad. You'll spend a month leveling up, another 3 months planning in advance on what you want to save to buy, and the plotline is, need I say it, nonexistant.