I definitely see them giving ET the qualifying offer. And I don't object to it at all.
It's not about what you think he's worth right now in a $/year sense. It's about keeping his rights for another year before waiting to see if you want to extend him or let him go.
Look, ET is incredibly inconsistent and frustrating as a player at times, but he's also not a finished product, and he does have the potential to be worth the value of the QO. Look at everything he can do now, the tools he has, and still think about the things he can/has been improving on. Just look at what he did with his three point shooting this year, which was his greatest weakness just last season.
The point is, when you have an opportunity to hang onto a player like that for only a year longer commitment, despite all the problems he's had thus far, you should usually take it. Just to see if he can improve.