I am a big fan of remix overall. With the early bugs and hyperspawn exploits aside i think the event is well done.
If they dont make remix events a permanent fixture then perhaps we could incorporate this style into chromie time. An example of this hybrid system would be to choose a timeline and have all of the raids open up in addition to the dungeons like in remix.
Since xp boosts are coming in TWW for alts maybe they could pull some of the aspects of the cloak in remix for retail. Also the gearing in remix is pretty good while leveling and a bit grindy at max but i dont think its nearly as grindy as retail.
This event has been pretty good so far and i think it makes for a good test run of what to expect for the future. Hopefully the devs make good choices.