College kids grew up with tweeners. Thats what they are used to. There is no reason that they should switch to a mid. I don’t really consider that part of the discussion we are having here though, but I can touch on that in a second.
Do tweeners help you cheat? At 4.0 - sure they can. I played 4.0 after an injury and used a Head extreme and then a PA+. I simply hit deep and heavy top over and over and wore guys down because they didn’t have the skillset to attack it. It was incredibly boring and soul sucking and it made me hate tennis. Luckily I got in with a group of guys who were better than that and started playing more dynamic matches. I had to setup up my patterns and game because what I was doing before was not cutting it. The frame I was playing with quite often was the rather underrated Yonex xi98. Amazing frame, but it needed a lot of lead, and customizing a frame was an endless task that I did not really enjoy. So I went back to the PA+ and it’s great, but I started missing all the shots I hit with the Yonex. Squash shots, heavy slice, more precise serves,...etc.
I got this frame simply because I was intrigued and grew up playing with a very similar racquet. I did not expect to be using it as my main frame a year later. The beauty of it is that you can play however you want with it. It’s not as demanding as a true mid. I know this because I bought a Yonex 89 to mess with, and the P93 just comes through the air so much faster and plays as big. I also had prestige mids for a while. To me those were so fun to play with, but more of a disadvantage on the court and more importantly a pain to string.
I have a baseline grinder most of my life. I hit with a lot of topspin. I did not expect the P93 to accommodate this style of play but it does for me. On paper, I should prefer frames with open patterns and large heads, but I actually find that my favorite ones are tighter patterns and smaller heads. Why? I don’t know, but I keep going back to them. There is no hard and fast rule for choosing a frame, but again, the biggest improvements I made when playing at higher levels were my personal fitness. If we are focused on talking about college players, I used to hit with a D1 female who was in such great shape. She did not hit harder or with more spin than me, but she moved so well and never tired out. It was like hitting against a very talented wall. To me, that is what gets you up a ranking in tennis more than anything else.