There's another thread somewhere discussing this and other issues. I believe that fixing these issues IS on the devs radar, but no idea when the fix is likely to come.
This has always been the case as far as I know, and while I agree the dialogue isn't quite handled right, I'm pretty sure it is intentional and not a bug.
the 5% -Res and 3.75% -Def are a non stacking effect from All Sentinel attacks, including the Primary target of AoEs and Cones.
You do NOT need to take every attack, nor both t1 and t2.
All I'm saying is, the possibility that there exists a mission in which you would want even more healing does not in and of itself show that the heal was nerfed too much.
Fundamentally, if you're getting hurt enough that you need a Big heal instead of constant high HP and Regen, there's something else going on in your build. And I'm not talking about Granite.
You had to heavily invest in recharge in order to have a 4 to 6 second delay all the time. So the benefit here is that people who don’t have all that recharge have a much more useful ability. And the other changes to the set mean that you don’t really need the giant heal as much. More solid defense, with more reliable high hp and regen means you won’t need much actual healing.
I don’t know what the Null represents, but to answer your other question:
yes, Clarion is the only Destiny with status protection. However the Melee Hybrid power also offers some status protection.
I'm not sure this is quite accurate.
It seems to me these powers often have longer recharge by default in order to justify them being as good or better than primaries/secondaries.
hilariously, the first thing I did was Google it and I said to myself "nah, they can't be referring to some kind of ancient coin, it must have some other meaning I'm missing"