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Reasons why I started playing TE:
1 - Fast army movement.
2 - Good starting army. It's no longer the case that Ivor arrives without elves, or Waleska with only one stack, and the archers are almost never built.
3 - Balanced castles. Inferno is no longer such a weak castle as it was in SOD, but rather the opposite: one of the strongest. There are many examples, I don't want to describe them :).
These are the main reasons, in my opinion. You can list the advantages of TE over SOD for a long time... And the fact that the slow unit is on the second floor or the town portal is on fire, it's not difficult to remember. But if you don't encounter a slow unit in the tower, you can always rebuild it.