1. I've always used TRIM via Chameleon ssd optimizer (earlier with Trim Enabler), but I just checked now and I don't have enabled TRIM. This is something you have to do after every OS X update. I forgot to change it after last Yosemite 10.10.2 update, thanks for reminder. Now I got nMP so I use it as a second computer.
If you forgot, nothing important happens, just drive working little slower? (I didn't take full test, maybe it's faster):
Read 430 MB/s
Write 140 MB/s
After change to TRIM enabled:
Read 520 MB/s
Write 230 MB/s
With SSD (vs HDD) seek time is very fast, so sometime you didn't notice slower speed - when you for example browsing web

If I forgot, after OS X update usually I notice something slower and then I change TRIM to enable.
When you buy a computer with "Apple" SSD disk, Apple uses TRIM, so I think we have to enable this option in older computers.
2. I have checked this option.
At the beginning when I have SSD as external drive I notice that it is possible to sleep SSD (little led light changes) and nothing happens, so why not in MBP? This is fast drive and wake from sleep should be very fast.
PS. nMP by default have enabled this option.