I'm glad to help. Thank you for listening! Yes, you're right about 3rd point. The main idea is to have different clocks ("bpm's" for each row), so the patch can be more complex. As another solution you can make just main Clock IN and 1 extra knob on the left side of each row - left side will multiply by 1.5, 2, 3, 4, etc. and right side will divide by same amounts. It's even more elegant. That way it's super easy to control instead of automating dividers, etc.
Another thing, you could consider different length for each row. To be more easy you can make it multiple by 4. That way different rows could have different lengths and that way we create a lot more rhythmic variations in seconds!
PS The more I'm using Vari-Step the more I create cool melodies. It's very creative and inspirational, just need a little bit more tricks in sleeve This is my go-to now for "scenes" of 3-4 oscillators, where 1 sequencer driving everything, so I just need to record it in DAW and chop