I think before we start piling features on top and overblowing everyone's capabilities we should first revise this list. While I don't doubt that it's wrong as you probably dug it out from the game's files yourself and touched it up a bit, perhaps we should reconsider some of the gear affected. For example, I struggle to understand how Parasoul's tag-in is a throw when I have only ever seen it collide with the opponent, and I don't quite see why Silent Scope counts as a projectile when no projectile is ever visible. Hmm, maybe that is a weak example as I suppose one could argue that a bullet is a projectile whether you can see it or not. Then how about the first segment of Argus Agony, and all of Theonite Beam? Lasers are continuous. If I shine a light for my cat to play with, I am not shooting it with projectiles. Perhaps what makes me uneasy is that not all of the 'throws' involve throwing anything. What if they were to be labelled as 'grabs' instead?
Of course, you are also aware that Prize Fight teams are entered based on combined Fighter Score where the highest total FS team of three used by a player in any one Prize Fight is the one that will represent that player in that Prize Fight. There is some wiggle room, as there is a threshold of 10% difference between the strongest ever team and latest entered team that allows the representative team to be adjusted within bounds. So if I was to enter a Prize Fight initially with the sole intention of racking up the highest PF score possible within a short time and therefore used a team of three fully levelled and skill maxed Harlequins, I could then decide I was bored and change my team to a projectile-based carry accompanied by two Peashooters (maybe silver, maybe mid-level gold, highly unlikely to be two maxed golds) and however much fun I might have had, the 3xHarle team will still be what other people will see and fight when I come up as an option in PFs.
Overall I think we should wait for the whole PF overhaul before we demand new/alternative features on the basis that PFs are boring. Also please correct me if there is any kind of definitive proof floating about that states otherwise, but what if Peashooter's stacking is anomalous and unintentional? Is there no possibility at all that it isn't supposed to stack, and that this is in actuality a bug in need of addressing?
Are you sure this is not in effect already? As two fighters from one team cannot die at the same time, Immoral Fibre's Signature Ability would activate on two or three separate occasions with each death, so that would be different instances of healing and so not really stacking into one. I have never used two Immoral Fibres in one team, though, so I'm just guessing.