Looks like the Westchase area is ramping up construction on off-road MUPs and eventually some improved on-street bike lanes. Most are short <1-2 mile stretches or connectors, but it's a start.
There's a public hearing on the future of this Mobility Plan so if you live/work in the area please try to attend or get your voice heard:
Public Comment on Mobility Plan through Jan. 15 - Westchase District
There's a whole powerpoint with the maps and stuff on their site somewhere too but I can't find it today - maybe someone else will have better luck.
It looks like a great start to improving connectivity especially along such a heavily trafficked area.