Some thoughts:
Your rows are mislabeled on the second segment of both the Base-A and Base-B renders 1.5u `backspace`, 1.5u `delete`, 1u `PgUp`, and 1u `Home` should be R2 (QWERTY); The keys labelled as R2 (`purse`, icon `control`, stepped icon `control`, etc. should be R3 (ASDF); All the `shift` should be R4 (ZXCV).
Some mods have icons, whereas some have legends would be more homogeneous to stick to either icons OR legends.
Maybe also include a 7u spacebar with the Alpha-A and Alpha-B (or not include a spacebar at all).
1.5u `Code` or 1.5u `Super` would be a great addition for Control Caps-Lock users.