I'm a freelance mac repair and software optimization handyman that figures out what he's doing as he's doing it. This will probably change the more I read up on these guides :) Haven't broken anything yet so I guess I've got a knack for Mac Repair.
Probably still a 3 out of 10. Adhesive is an automatic 5 point reduction and it appears you have to remove the logic board from the soldered battery connection to disconnect the display, though conceivably, you could peel the battery out of it's adhesive with the logic board. Maybe I'm looking at it wrong. Hopefully, we'll see a screen replacement guide soon.
The iMac that came with the magic mouse? I'd say the iMac is the main event.
I think the fact that there's less parts and that this iPod Touch is crazy light will cause less damage from drops and bumps. The lightning connector and the speaker grill will probably allow less water in than the larger iPod connector if the device were to be briefly submerged. Basically, keep an iFixit thirsty bag with you and perhaps get a case for your device and everything should be relatively safe.
I was going to suggest something similar. I don't think its for "sh*ts and wiggles"
if you're playing music that is