As some other player has mentioned earlier in this thread: The 'Concentration' stat is going to severely impact multiple builds once boons application is split among different classes. Removing it from the game at this point might be a healthier option, unless there is some in-house concern about power-creep decimating PVE instanced content and the only solution is to make players run sub-optimal gear combinations in an effort to make bosses survive longer. There is also the concern about trait reworks. I sincerely hope that it is not something like the phalanx strength trait in warrior tactics trait-line spread across a few professions that would offer group-sharing of boons in such a passive manner.And if they gave every profession one such trait it will just end up making the community look for the one profession that loses the least to bring the most of it, much like how they turned to Chrono or the old PS warrior/current druid. Skills like warrior's 'For great justice' or guardian's 'Stand your ground' are what I hope to see emulated if boon diversity is enacted.Give every core profession (not specialization!) an utility skill which applies in a radius certain lesser boons like might/fury/vigor for maybe 50% to 60% of its cool-down , while another utility skill grants greater boons like stability/retaliation at a lesser ratio to skill cool-down. Every class currently has some redundant utility skills that nobody uses no matter how niche the encounter, just skim through the profession forums and you will find these useless skills easily. Edit: Replace these useless skills with party buffing ones.Making each 'DPS' slot take one of these party buffing skills will just reduce some some personal DPS but buff group DPS. Let the players think for themselves to fit their situation:If coupled with removing concentration stat/boon duration from the game it will actually make players think up combinations of how many of these utility skills they will need to keep in a group for optimal up-time to suit their needs in any situation (WvW, PVE) while freeing people up to run berserker/viper/healing/toughness stats as needed.It will reduce, in a raid setting, the number of supports from 2 boon bots + 2 healers to only 2 healers. So overall group DPS would be the same/higher even if people have to lose some utility slots to group buffing skills.