To be clear, the only things I remember distinctly about alts in WoW are the following:

1. The only 'shared gear' was Heirloom gear. This included 'shared gear' via transmog. If I wanted to wear something on another character, I had to go fetch it.
2. Having leveled 28 jobs (when Alliance/Horde are concerned, back when job list had 14 jobs), I still had to level each and every alt. No shortcuts, per se.
3. There were no 'shared mounts' either. Purchase one, or get rewarded, and that character had the mount.
4. Bank space was not shared either.

What I remember about alts in Blade & Soul (and other F2P MMORPGS):

1. Crafters and banks had a few limited shared slots.
2. Paid Glamours (requiring actual bought-with-money 'crystals') were sometimes shareable, more so in Blade & Soul, less so in other MMORPGS
3. Advancement for alts was not easier
4. One picked up mounts the old-fashioned way - purchase them in-game with in-game currency, mostly.

Other games were less 'alt friendly' and more 'alt required if you wanted to play another class'.

Your mileage may vary.