The tower is a social space but there hasnt been much change to it over the years, besides MoT, that have impacted game play.
There should be more reasons to go to the tower besides the few vendors that are currently there.
Stuff to spice up the space.
Like a weapon foundry market, improvement on faction vendors, events for individual factions that anyone can be apart of, a library that lets a player visually see their lore books build up, a shady merchant, a SRL vendor, SRL teams to join, a raiding organization/group/person (like how saint runs trials), a crafting system, etc. etc.
It should be interesting/ intriguing when you go to the tower