Yeah right! say that to Levite and Harmonious.
No, I actually also think it's being taken way too seriously. There is a reason why a Third Temple cannot and will not exist until and unless the messiah comes: there is absolutely no way that with the world in the state that it's in, we can seriously even begin to discuss the practical options for a structure that would represent unity amongst all the Jewish People and harmony between the Jewish People and all other peoples, to say nothing of harmony and clarity between people and God.
The messiah will not come until we bring about
tikkun olam (the repair/healing/amending/correction of the world), and if we ever indeed achieve
tikkun olam, it seems likely not to be any time soon-- and by that, I mean in the foreseeable future. I don't see it happening in our lifetimes, or our children's, or in the next several centuries, at minimum.
So considering how very far we are from living in that world, it is both pointless and ridiculous to bicker over how things might look or work or be discussed or settled or done when that time comes. That's one of the reasons I don't usually speak about the Third Temple unless (as in this case) responding to a direct question about it: as something belonging to the messianic age, it has zero pragmatic relevance to Jewish Life in the world now, save only as a symbol, a reminder to us of the
tikkun olam towards which we need to be working. And any attempt to bring it into the "now" as anything other than that is inevitably doomed to create dissension and friction, which is probably why we are prohibited from trying to rebuild it until that time arrives.