scale down playerchars and leave NPCs as they are (with their current "natural" ac and skills), thus requiring teams to take them down WITHOUT an increased playerbase on hand you get either
1. bot/seconds/multilog/script teams
or
2. players who are used to and need to rely on good gear to accomplish anything in the current game setup would be forced to lower their standards or even effectively stop going out = leave
there was a time when playerchars were much smaller and people were using gear they wouldn't today ... however exp was gained differently and npcs didn't have that much of the shit-idiotic "natural" ac they usually have right now
example: 2 Rangers/militia/legends of much bigger stats than back in the days BUT with poleaxes (yes, we tried to get other weapons before ... failed of course) fought Ash for 45 minutes ... and he didn't even have a maul
back in the days Laurel (gladiator/no-combat lay/hero) was able to repeatedly kill Ash in a team with a monk (no layman/hero)
take a wild guess what will happen if you force everyone to rely on "poleaxes" (or similar-quality other weapon-types) ... playing Genesis above champion without a team (how do you get a team formed from the current playerbase for longer than 2-3 hours other than option 1 above?) will loose any sort of goal
maybe except you have a char in the not-yet-recoded (not even started) MM and can supply your fighter char with enough great gear
btw. comparison to WoW and the trinity:
in end-game WoW (been for almost 1 year in a guild with server-first kills and achievments - 3-4 raid evenings per week, 8-11PM with a 15 min. break ... focus all the time) you spend your solo time preparing for raids - gather herbs, food, cash for repairs, monkey-anuses for rep (enchants), etc. ... SOLO!
and before you are approved to participate in such end-game raids you have to bring already epic gear with you = doing PUG 5's and 10's (I never got to experience a 25 PUG for other than 1-3 boss dungeons)
if you want to make end-game Gen available also in raid-mode only ... do you want to leave the "solo" part to be herbing, forging and making cash on smallfry npcs only? what is NOT boring in that?
my thrill in solo WoW was to collect rare pets with my huntard (he has 5 of them by now) and collecting good stuff with my raider char (boomkin/feral) to supply my smallfry chars I've been experimenting with ... I hardly see such possibilities in Gen in the next years
oh and we didn't even touch the small fact that weapons/armours once acquired in WoW stay with you until YOU want to part with them ... if any of my WoW chars would each (let's assume some "WoW-Arma) month have to first buy/create some weapons/armours (don't even start with the time wasted to max out leatherworking AND smithing AND jewelcrafting on different chars) and then do a few 5's and 10's to be ready for a guild raid for the epic 25's ... I can safely assure you only selected few would be playing such WoW
reference:
http://eu.battle.net/wow/en/character/a ... #168:14922 - main raider, leatherworker and cook
http://eu.battle.net/wow/en/character/a ... baktsa/pet - petsesssss, alchemy for raider and fun dps for PUG epics
http://eu.battle.net/wow/en/character/a ... oug/simple - fun tank for PUG epics and jewelcrafter for raider
http://eu.battle.net/wow/en/character/a ... ood/simple - beneficiary of the BOA items (4 of them, as you can see)
http://eu.battle.net/wow/en/character/a ... mal/simple - my disenchanter and inscriptionist