Thinking a bit further on this, besides the Western-Morgan connection which I would admit is a stretch,
the riskiest piece of this BRT loop is signal priority where the buses cross Dawson and McDowell. This happens at Lane (Westbound) and Martin (Eastbound.) These are state highways and I remember this was a sticking point a few years ago when we were considering alignments for on-street light rail through downtown as well.
With a perfectly timed one-way pair like Dawson/McDowell, it is not possible to have perfectly timing on all the cross streets. It is, however, possible to perfectly time the signals on just one of the cross streets, in just one direction. I would pick Eastbound Martin as that street on account of the BRT. Then, on the north end, I would have a flyover to cross the pair just north of Lane, next to the railroad tracks.
The BRT route is orange, the flyover is green, and the land owned by GoTriangle is purple.
This would be kind of expensive ($10 million?) but it does fit with the topography and existing built environment, would benefit all four BRT lines, and it could save about 3 minutes for every single bus that uses it by bypassing the traffic lights at McDowell and Dawson.