TCS is a great feature. The last bit of charging takes quite a bit of time for little added capacity. Turning it down to 90 or 95% will reduce charge times with little loss of run time. Helps pack life, as sitting at full charge stresses a lipo. Some chargers have a fast charge setting which is similar, iChargers can use a higher end current setting, etc.

Agree puffing is not normal, and raising the cut off will likely help the most. Lipos drop off quickly at the end of a run, in most cases a slightly higher cutoff doesn't reduce run time much. Better yet stop earlier, as soon as any power decrease is noticed. Packs shouldn't come off with much if any noticeable heat, should be at least 3.7V per cell after sitting for a while (resting voltage), for best life.

Agree proper storage helps a lot. Charge just before use, don't leave them sitting fully charged. Or discharged. Definitely not in heat, hot sun, parked car, etc. Store in a cool place.