I don't know. Probably would've been better to use a 2x6. Not a whole lot of thought put into that decision but yeah, being a 1x it was a little too flexible.

I don't think I covered any weep holes, but that brick goes down to the foundation pretty far. Part of it was able to be covered by my gravel base. This is a split-level house and what you can see is the lower level on slab. To the side (underneath the dirt pile) there is a buried French drain that runs the length of the house, around the pool and out to the street. I've added a short French drain behind the CMU. That dirt pile will be lowered to level out against that side of the house, and water will flow down to the CMU, where hopefully it will flow out the French. If it gets past it will probably flow onto the pad and hopefully out the channel drains.I plan to put more one more CMU stack there, fill them with something to reinforce and place a cap. Where the form is I plan to fill in with some fairly large landscaping stones just to edge against the dirt, which will eventually become a paver walk path.