Welcome back! I don't exactly remember the timeline for things changing, but shops have had a revamp, quests have had a revamp, as has the battle system.

Make sure you go to Personal > Dashboard on the top nav bar to collect any unclaimed loyalty boxes you might have c:

Useful Links:

What to do on Subeta? FAQ Useful general information for newbies Customise your dashboard Finding friends (Chit Chat) SubetaLodge (Offsite item database, pet colours etc.)
Current site event: Masquerade