IMO, in early game, you have to use tp to get back to lane if you have recalled especially if they r in lane, but u r not. However, if you are winning your lane and your allies on the other side of the map are havin trouble, by all means use it. Teleport is a flexible spell. You can use it to split push, save your allies, surprise and enemies and many things more. It's your choice, but think about what your team needs right now. If you are behind in turrets and one on the enemy is almost done, by all means, tp to it. However, if your team is losing a teamfight, dont tp to the turret, but save your team. All in all, just use it in a productive way that allows you to reap benefits.