I don't really expect any changes in the rate of reimbursement for flight training under the GI Bill anyhow. Here's why:
First, people used to get gouged with the GI Bill back in the day. Some flight school owner would say, "just sign the whole thing over to me, I'll get your ratings." Often as not some poor GI went over budget, or woefully under budget, and was out a big lump of cash either way.
Enter the "Sixty Percent Rule".
To prevent that from happening the VA only pays 60% reimburseable costs. The problem with this? As schools are required to put you through a 141 program so you can get those funds, you're likely hosed. Many 141 programs are billed at the same rate as part 61 programs. The additional hours required run the bill up fast. Net result? The 40% you pay out of pocket for a 141/VA program can be MORE than *100%* of a part 61 program you pay for entirely yourself.
Second, it would require actual progress on the part of the VA. It's a government institution, and change there moves at a glacial pace.
In other words, do the math, and choose wisely.