I can't say I ever experienced that much trouble with an AICS mag. Little fitting here and there to help things along, but I've been able to get them all to feed flawlessly. I've found that the main facet of getting the mags to both secure in the gun as they're supposed to and feed properly without too much magazine fitting is getting bottom metal seating depth correct.
Not sure what you used for bottom metal, but there's good options these days for hiding mag release buttons; these greatly reduce incidental drops. Certainly, an accidental release can still occur, but to certain extents, one takes that chance with any DBM; there's only a small indent and a thin spring loaded tab keeping things together for the vast majority of designs. The old Browning A-Bolts that had the DBM secured to the inside of a hinged floor plate were a good design as far as not loosing them or having them accidentally drop in the snow/mud when unloading with cold hands.
Overall, I've been thrilled with the functionality of AICS mags; my main affront to them is that they can make one handed carry more cumbersome. Depending on intended use, it might not matter much, but I prefer to stay with a flush mount mag when possible, and any cartridges I put in a Tikka that I plan to carry in hand a lot from here on out will fit factory mag confines. Further, I ran a lot of long action abd magnum cartridges in Tikkas at 3.34 for years with a lot of good results; ergo, in the context of hunting, there's not always impactful gains to be had by chasing more COAL.