Yes, Teleports is one of the longest maps we've played. But it didn't have the absolute longest ones, like 7 Lakes, for example. But it's also one of the most balanced. I'd put Hotspot in second place for balance.

The Teleports map can be improved by addressing one key issue: removing the landing point on the island (in the original version, it's a map glitch that allows you to land on the island without destroying the teleport).

Regarding Slugfest, you need to be very careful – play it only if both players understand what they're doing. Otherwise, you'll end up with something like: "Let's play a quick game..." and the result won't be a real rating, but...