Path of Fire makes it a good time to return to Guild Wars 2.
I've been playing it since the expansion opened, and it's pretty good. it's clear ArenaNet learned a lot from Heart of Thorns, especially from criticism. The new expansion is much friendlier to solo play. Mounts are fun. The maps are HUGE, and very nicely designed - they aren't the maze-like layouts like HoT. The new elite specializations add some nice variety to the professions, without invalidating the old specializations.
At the time of this posting I'm only about half way done with the story, but overall it seems pretty good. The pacing is much smoother, and they are actually answering a LOT of questions, even ones that have been lingering since GW2 first went live. It's still GW2, so the writing isn't going to win any awards, but they've certainly done worse.
If you've been thinking of returning to Tyria, then stop thinking and just do it already. =P