This has been covered elsewhere but to summarize, SL has 2 skips:
- From SW/Org to skip the Maw. This is safe to take; and
- A campaign skip in Oribos that unlocks WQs and covenants. DO NOT TAKE THI SKIP.
Why? Because it means dungeon loot will be level 50 required and there's no way to reverse or fix this. IIRC Blizzard has acknolwedged that this is unintentional (ie a bug) but it's not high priority to fix. It could persist for years.
If you stay in campaign mode (that's what it called when you don't take the second skip), accessing the zones is harder. You have to progress through the campaign (nobody wants that), stick to Bastion (which you get immediate access to), get summoned or use the engineering wormhole toy (which tends to be an issue for F2Ps who have to manage tradeskill slots).