It is an interesting balancing act. Do we get our players better prepared to the heat so we keep our early season advantage, vs exposing our players less to the heat so they will be better later in the season. IMO since the league doesn't allow any more early season 1:00 games in Miami, we might be better off letting them practice more in the bubble during TC. Especially with the up paced speed of TC it might be a good idea to have as many of the practices inside as possible.
This year our season will be 22 weeks long, plus the playoffs, with only one week off. I think there is more chance of over working the players, than there is having them not ready. Of course you have to have SOME of the practices outside, but I would have at least half of them inside. Once every one starts to get their timing down you can have more outside to get them ready for the start of the season, but early on I would have more inside. But that is just me. The league has decided to take away our home field advantage, early in the year, so there is really no need in killing our players just to prove they can handle something they will never get to prove.