There's a large subset of players unhappy with healers and want them to have more inactivity in their kits, more options for DPS spells, and more emphasis on rewarding good healing rather than punishing it. There has been a constant battle against a numbered few fighting that every step of the way because they don't want more engagement, interactivity, or DPS abilities, with the only solution from group B being reiterated over and over that as long as one healer has a low-engagement factor like the current healer model or less, then changing the other three would be fine, but no one in group A wants their favorite healer to be the one who takes the L.
We already have BLU as a resource in this game, why not use it? Some people would appreciate playing a real BLU and not a limited BLU, so curating a selection of its spellbook into a fixed DPS toolkit with reworked effects that are balanced alongside the other caster DPS is already something people have mentioned wanting in different places. Doing the same and created alternative builds for a tank BLU and healer BLU could allow us an opportunity to create the low-engagement healer without actually sacrificing BLU, because DPS BLU will still exist. Then you get a healer who doesn't have to spend time spamming DPS buttons since they have a permanent DoT that covers all their DPS responsibilities, and they can instead focus on just healing. That's my point. In a perfect world, we wouldn't need a solution like that, but I keep trying to find different bargaining chips that everyone can get behind so that we can move on, and perhaps provide united feedback that the current four healers can be adjusted with a singular caveat, rather than constant friction which leaves conflicting feedback.