Let me qualify the following by mentioning that I was a T-38 FAIP. That means that my opinion - while informed on the topic - is also biased because I believe that I am fvcking awesome. Deal with it.
I think we need FAIPs at UPT, and UPT would be a worse-off place without them.
Sure, there are plenty of LTs walking the halls of any UPT base, and there are plenty of those LTs that can get shouldered with some bitch work around the squadron. But really, those cats are students in a challenging course, and their time needs to be protected by their flight commander and other leadership to make sure they spend their time and focus in the right place: Mastering the basic flight admin they won't have the time to learn later.
So, because those LT studs definitely CANNOT be tasked with many of the things around any SQ that you'd normally give to a LT or young Capt wingman in a CAF squadron, someone has to be there to pick up the slack. This is where your young FAIPs come in, and this is also why being a FAIP has some pretty awesome and pretty not-so-awesome aspects. You can (and absolutely SHOULD) fly and instruct your fvcking ASS off as a FAIP. On the other hand, you're going to get some shit duties around the squadron, and you'll probably be working longer hours than your average fresh-from-the-CAF 4FL Viper/Eagle guy who's now flying white jets. That's ok...that CAF dude needs a little break.
Now, because FAIPs end up a bit behind the power curve when they hit the CAF, they gotta be wise to this and have good leadership show them how to be prepared for later. Personal/professional goals might be easier to accomplish in that AETC assignment than later in the CAF. Developing winning habit patterns related to basic admin, study, and work ethic pay big dividends later. LISTENING WELL to the older dudes from the CAF and internalizing their lessons can be huge.
These things enable a FAIP to hit IFF, RTU, MQT, and beyond with the basic skill set that will ensure success.
It goes without saying that squandering that time as a FAIP will bring one to the opposite extreme.
So my advice to FAIPs is this: Don't think that anyone (you, the USAF, your career as a pilot) has hit the big PAUSE button the moment you graduated UPT. While your UPT bros are off doing fun and amazing shit, don't forget that they are growing as pilots and as professional officers. YOU MUST ALSO GROW. Find ways to do that in the situation you've been given, don't slack, and always keep your scope open and set to long range search so you're prepared for the next step of your flying career. Do all that while flying your ass off and you'll be fine.