i think that by and large champions (in my limited experience granted) are fine more or less as is. I do have some recommendations, more like minor tweaks, though.
- i have not seen a single champ drop a chest yet. Not one, given the couple of dozen fought that doesn't make a lot of sense. Their chests should have a higher drop rate.
- the sometimes spawn on plot npc's. Not that it matters really when they can't be killed anyway however it suggests the code is a little sloppy which brings me to ...
- their spawn should have some sort of cool down. Granted it's not common but it's not unusual to walk into a group that has 1 or 2 champs. My personal record is 4. At that point you start wondering if they aren't "normal" and the other mobs are actually gimps. The code could use a cool-down timer that say only allows a champ to spawn at maximum once every 6 or 10 seconds say. This would still allow for the occasional battle with 2+ champs but at least if the group (or solo player) takes it slow and steady they really shouldn't have to deal with more than one at a time.
on the whole i think it's a great change. I remember pre-motu when it took serious effort to build a toon that could run "epic", in a group, without getting planted. Especially if you weren't going to win/buy your heart but were running the epic's to get your tokens. It was brutal and it was amazing fun. I remember my first toon that could sorta complete in a group with only a few deaths and finally earning his tr heart and it felt like an amazing accomplishment. Hell back then the number of people who could reliably solo epics (and not just the "easy" ones) could probably be counted on two hands for any given server.
This is no where near a return to those days, but it is a nice baby step back towards them. More difficulty will bring more enjoyable playing. I mean really who remembers that 247th run of impossible demands that wants smooth as clockwork? Nobody. Now who remembers that shroud that was so close to a party wipe but managed to have one or two guys get just a little lucky and pull the run out of the fire? Everyone... Every single person in that run does. All of the most fun times i have had from a questing perspective have been those messy, dirty, "what the hell is going on" type of runs. And in the old days many of those ended in wipes. You know what we did? We decided that we needed a "trapper" or a "healer" or a different difficulty or we sold, repaired, restocked and charged right back in to show that damned quest who's boss.
Today accomplishments are measured in "past lives" but it wasn't always so, they used to be measured in quest completions. That feeling you get when you finally finish off that 3rd bard life, yeah we used to be able to get that feeling a couple times a night depending on the content we were running.
I greatly miss those moments as they are so very very rare now, with champions we squeak a little more back to when it felt like you accomplished something by completing the quest.