The pet upgrades were changed to AoEs and given a huge increase in endurance cost. You only have to use each one once, but using both unenhanced takes 91 total endurance so you'll probably want two end reductions each.
Were you here for the Genin changes? They don't get bows any more, instead they get extra shuriken attacks when upgraded. There have also been AI tweaks to help melee pets (not sure how successfully since I play ranged primaries). Hand Clap was changed to knockdown instead of knockback on the Bruiser, but last I heard he was still overly fond of throwing rocks at times.
Also, pet recharge rates can no longer be buffed (turns out that was one of the big causes of pet AI hiccups). That makes Chance for +Recharge procs worthless in pets and nerfs the Soulbound set. It also applies to non-MM pets, including Lightning Storm. On the bright side, pets can no longer be recharge debuffed either, so they ignore recharge slows.
Oh, and Poison Trap in /Traps got nerfed (actually bugfixed). It used to spawn multiple clouds, which each had a chance to hold and a chance to set off procs... now it properly checks only once. It no longer does huge proc damage and doesn't hold as often, but it's still a handy power. It does still have massive -regen so it's great for EBs or higher even without the chance to hold.
I think they removed the Medic's brawl attack when he gets upgraded, so supposedly he's less likely to decide to run into melee now. I'm not sure if he still sometimes does though since my Mercs MMs are too low level to have a Medic.
Bots have developed a couple of annoying quirks. Protector Bots seem a bit more likely to decide to run up in an enemy's face now, despite having no melee attack. Also, they tend to get stuck on their own Seeker Drones and have to be teleported or resummoned to get them off (sometimes Goto spammed on the ceiling makes them jump free). Fortunately, in I15 they're removing collision detection from Seeker Drones so that problem is going away soon.
Cascade, level 50 Blaster (NRG/NRG since before it was cool)
Mechmeister, level 50 Bots / Traps MM
FAR too many non-50 alts to name
[u]Arcs[u]
The Scavenger Hunt: 187076
The Instant Lair Delivery Service: 206636
I need a MM update since im a MMaholic. What are some of the major changes within the last year of the mm's and their pets? Do brutes still throw rocks all the time? Is it still buff every pet separately so it still takes 5 or so minutes to get ready for a mission? Whats the good and bad changes we have received?
Thanks