It's not about having it as complex as SMN or BLM. It doesn't matter whether regular BLU would be less or more complex than SMN as long as it's unique and different.

We already have SMN with DOT management + burst windows, so if BLU is also like that then it'd be similar and people will complain. Yes you could argue that DOT management + burst windows can come up in different ways, but even now people are complaining how WAR is too similar with DRK even though their burst window come up in different way.