I've been using Ableton's piano roll for a decade, and I was doing mostly standard multi-track band stuff, for which Ableton was a comfortable DAW.
However, my midi needs intensified greatly in the last year with Superior Drummer 3 and other new instrument vsts, and I tell you what, Ableton's piano roll and midi editor is not 'simplified' it's actually UNUSEABLE for complex material. It's simply horrible. It looks totally flat, it is missing massive amounts of work assists it could have. It is flat out ridiculous that is has stayed static over the years with one gouging upgrade after another. It doesn't interface well with VSTs and gives you zero prompts on what instrument is where. Its zoom is a complete joke, and you zoom in and out constantly when working in midi editing.
I'm looking for a plug-in that will make it so I don't have to stare at that awful piano roll any longer. The velocities are WORTHLESS. You have to SPLIT multi-instrument pieces into individual tracks to edit velocities. It's hard to see, it's hard to manipulate, the zoom is terrible and innacurate. I'm ok with the rest of the software, but until this midi/piano roll is overhauled, I'm looking elsewhere. I hate it to the core. And forget chopping samples in Ableton as well, although with the Simpler, you don't really have to chop samples. Thank God for tender mercies, because Logic is a thousand times easier environment to cut samples in as well. Simplicity doesn't help when you want visual cues, and sample cutting and midi editing don't need a super sterile, dysfunctional environment.
There are some third party sequencer/editors. I'm running to them at high speed, but its unacceptable that software that claims to be the world's gold standard for autosyncing and playing samples live (which it is good at) is so lousy at midi editing and loop cutting.