Basically agree with you about 9 BR, the only issue I have with Tate is his passing can be pretty ropey, it's no advantage getting quicker ball to the 10 if it goes behind him. I would also have Lonergan as our run-on 9, but I don't think that's going to happen. Not sure about 10, probably stick with Lolesio, however Lynagh's familiarity with Tate is appealing.
I don't share your dislike of Kellaway, I would retain him and Wright and bring Marika in for an injured Daugunu. Toole will get his chance, hopefully on the EOYT, just not yet. I also rate Pietsch ahead of Sapsford, although I imagine you disagree.
12 is a problem, Paisami's impact in Super rugby is blunted at this level, so all you are left with is a guy who doesn't pass the ball. I would give Stewart a crack, sure he isn't going to bust through the line, but he's a solid defender and he will at least create some opportunities for Len and the other guys out wide.
However, as you say, with out somewhere close to parity up front it's all academic. A fit Bell and TT up front is essential, I like both Matt F and Nasser, so I'm selecting the best line-out thrower of the two. Lock is another problem, I'm selecting Frost, but who with? Perhaps Williams, with Hooper at 6 and Valetini at 8. I would start Reimer at 7, Tizano is just too small, and give the medicos a bonus for speed with McReight.