No, pivoting tactics is just because certain people like to show up and turn suggestion threads from "I do/don't like this suggestion because..." into, "the problem you are having is invalid because...". And frankly I don't really care how valid you think my issue is. The solutions you present are present, true, but they are a long walk on a hot day, and could be made simpler while also introducing something that I think would be a useful and fun expansion of the crafted power system while keeping in scope.
Thus far, the only argument that I've seen you make against the actual suggestion itself is that you don't like suggestions that encroach temp powers onto existing pool and power sets. Ok, fine. That's personal preference, and it's valid, but it's not exactly constructive feedback to the suggestion as posted.
This is probably a question we actually can answer. Given that Teleport Target used to be Teleport Friend and Teleport Foe before being (rightly) merged into one, there probably is data somewhere of how many players had taken Teleport Foe. My anecdotal evidence is that back when I was playing on live, If you had Teleport and picked up TP Foe over TP Friend, you were either using a build for PVP (which eventually fell out of favour when TP Foe gained its immunity phase against players) or you were a weirdo. However, Flurry has also traditionally been a maligned pool pick, and even it wasn't so unpopular as to need to be paired with a different power to make it worthwhile.
Yes, it does mean you'll be able to TP bosses away. But you can plink bosses with the envenomed dagger and pull them too, that's hardly broken. As someone who did take TP foe on my stalker thinking it would be a great tool for mitigating aggro, it wasn't nearly as good as I'd hoped, and if this is intended to be the main use case of it, the sucker who tries is probably going to lament the lack of accuracy slotting. And if it is a regular part of your strategy, then you're probably going to want to pick up the power anyways just to have the version that lets you teleport allies and slot it.
You say it doesn't happen. I had it happen yesterday to me, twice. Exiting and re-entering did not resolve the issue, neither did waiting for 15-20 minutes, running around and taunting the guy in the wall and trying to bait him out, or to find that one magical spot that would let me shoot him. Both the brown and the purple caves have a lot of really janky geometry, and yes, I probably will have to pick up TP Target on my stormy because, honestly, I don't think it's possible to close all the cracks that mobs fall into there, though I'm still holding out hope that when I finally get Tornado it will give me enough versatility
I was thinking 5 charges, a rare recipe. Limited enough that having the power ready for every spawn would be impractical, and missing with it would hurt but wouldn't also totally waste it.