More intelligent expanding of brushes to create one complete live path, without the need to manually edit and join.
More intelligent expanding of brushes to create one complete live path. Currently need to manually edit and join the path as it duplicates at the position of each brush repeat. I suppose what i want is for the expand to automatically average and join the segments of the pattern brush.

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Hmm... I personally believe a 'smart' technology that tries something like this won’t ever be smart enough to never have mistakes, and therefore be perceived as stupid... sometimes or even most of times.
This brush doesn’t need anything like this, but just aligning endpoints at both sides. I tried to reproduce it, and it took me longer to match your image than to make sure the endpoints are at the same horizontal guide.
Plus I added a no-fill-no-stroke rectangle at the bottom to control the tile bounds.
The request still has merit — thanks for making it!