EPT1) Terran for the last number of patches has just been getting nerfed and Zerg getting beefed up. Major over-reaction on blizzards part to the grumblings of the SC2 Zerg players. This was even reflected in todays patch which again seen dropships nerfed and Zerg buildings beefed up for something like the 3rd time in a row. Which is disheartening.
2) MnM has become practically unviable nowadays at diamond level. I can only speak for Europe but you have a large number of players just going roaches and marching over your marines. You can never produce enough maurauders to counter the amount of roaches Z can get out when its 1/2 base vs 2 base. If you don't lose outright to this then it usually ends up roaches + banelings which are practically impossible to do anything to with MnM. By necessity you get more marines than maurauders and therefore your army quickly dissapears due to roaches and banelings being so effective against marines.
3) Theres talk about terrans having all these options to go for and therefore Zerg is still at a disadvantage. This really isnt correct. Terran going for either a marine heavy opening or some sort of a hellion opening gets shut down instantenously by roaches and can often then lead to a counter and win. What does that leave for terran to do? Well maurauders you can get but they due to the economic position you'll find yourself in will never be en masse till later on so that doesn't solve your problem. Tanks? Sure but were talking siege upgrade + good number of tanks, thats miles away, thats mid game talk. Not to mention it restricts your mobility pretty badly. Apart from that your left with a banshee opening which in my opinion most diamond level players would be able to handle reasonably well but I guess its worth a shot.
4) Next I would like to point to the amount of effort required should you choose to go MnM to keep yourself alive against an army comprised of Roaches/Lings/(sometimes muta) + Banelings. The zerg mainly only has to A+Move where as you need to split everything up and even then your army is at disadvantage. You may have avoided ultimate destruction by banelings but the rest of the Z's units like roaches are getting free hits on your units and your units are no longer in an advantagous position against lings and roaches/mutas as they are so seperated and able to be surrounded. Even should you put in the effort, you'll usually come out with higher unit loses compared to the Zerg in such a skirmish leaving you unable to attack the Zergs economy afterwards and leading eventually to him expanding and rolling over you.
In conclusion I think if anything Zerg has been put in a more advantagious starting point by the recent patches compared to Terran. Certainly I see this reflected even in Europe ladder. I rarely find a terran to play these days, its mainly Z and P I play where as it used to be a terran practically every second game if not more a few months ago. Certainly I've painted a bleak picture here but this has been my experience over the last number of weeks and it's pretty annoying.
