I can't help but thing the busses could have used a tappered necked-down bit between each pad to make cutting easier. A fat solid bus is harder to cut, and you can't use a veroboard rotating trace cutter.
In fact you could include a trace cutter option in there was a small hole at each of the neck-downs.
+1000
Have a small hole in the copper (not through the board) , just big enough to use as a centre-mark. You probably want something a bit smaller than a vero spot cutter - a small twist drill works fine.
The neck will also help with forming solder blobs - solder will be less prone to running along the track
I think the pads are a bit too small - looks like they are smaller than the min annular ring spec for many PCB suppliers. They could be wider - obviously the pad shape on each layer would be rotated 90 deg.
This would also make it easier to solder-blob between adjacent pads without needing to use the bus rails.
I'm not sure I'd even bother with resist - with the right pad & gap sizes it's probably not going to help much.
I also think you should have a symmetrical gap each side, rather than offset, so you can link a trace to the bus either side.
TBH I wouldn't bother with the LED blinker stuff - it's just a distraction from the core product.
Why 1.2mm thick rather than the more standard 1.6?