I absolutely agree that this would be a very significant tool. Moreover, I would argue that it should be better.
For example, the one in Cubase/Nuendo only supports 1/4 note patterns. This forces people working in other time signatures (whether dotted or 1/8 or faster due to quavers, etc to have to calculate their own solutions and create a pattern from it. This should not be such a chore, and I would hope that Presonus can outshine the Steinberg team on such a fundamental & functional time-marking tool.