It does have its use cases. Mainly, Haste Forge event. That +1 haste? Makes it so you do not lose haste buffs on you. Still, the moment you get two haste forges in a run, which is rare, it becomes a moot point. Also, cultist exists.
Haste forges make sense, but I don't think +1 haste will combat 4 slow, and especially not 4 weak, since you'll have it forever if you don't clear it
