I feel like this is so 2016, and hard to fathom that we are still stewing over this topic. The issue was never with the tool kits themselves, so modifying them really isn't going to change the meat of the issue which lies in the content of the game, and the attitude of the players. As an example, the ability Assize benefits both a healing minded and a DPS minded healer, yet a lot of WHMs don't utilize this skill, or not as often as they should.
I really hate seeing figures like 'healers have 60% downtime' or anything along those lines. Damage in this game varies on a lot of factors. The only figure that really matters is healers don't have to heal 100% of the time in any content, and there is nothing to punish healers for not filling the gap with DPS skills other than being scolded. But guess what? There also isn't much reward for adding the DPS other than a self pat on the back and maybe a few comms. Making healing more interesting for yourself and your mates by weaving in offensive skills between heals (or for others: weaving in heals between offensive skills) is a playstyle.
It is unfortunate that one playstyle benefits the entire group, while the other only benefits the player. However, it is fortunate that the heals-only playstyle doesn't hurt the group. So you honestly have to choose your battles, and luckily most of the battling happens here on the forums and not when peeps are actually playing and working towards a clear. I can say that when I tank, the only thing I care about the healer doing is keeping my butt alive. The regens, shields, ogcd heals, and timely cures are what I notice.