Only because there's like, 3 characters that scales on HP doesn't mean Homa is the 'universal' spear.
And since when only HP scaled characters can use Homa ? Just because it's Hu Tao's BiS doesnt mean every other character have to scale on HP to use it. Xiao can use it. Xiangling can use it. etc Is it their BiS ? Probably no. But is it really good on them ? Hell yes. And last I checked, being good on generally everyone counts toward "universal"
Only because there's like, 3 characters that scales on HP doesn't mean Homa is the 'universal' spear.
Any polearm character that does damage will love Homa over literally any other spear. The current spears are kinda lacking compared to Homa on most units in comparison. PJWS and Vortex require field time and conditional stacks, and Skyward Spine is kinda trash. Even on Raiden, an active Homa will outperform Ingulfing Lighning until high refinements. Homa is a top-tier DPS spear that gets a huge steroid at <50% HP that literally any polearm character can use and get better results in most cases. Quite universal if you ask me.