I noticed that there's a toggle for using Attacks of Opportunity or not and then saw that Sneak Attack is an ability. It seems like it'd make more sense to make Sneak Attack a toggle as well (though not sure when you wouldn't want to do the extra damage). If the toggle is on, then Sneak Attack will be applied if that attack qualifies per the rules. I just feel it's cumbersome that I have to click the ability and then click the target instead of just being able to click on the target and have it auto applied when applicable. Maybe a nice quality of life change.
They handle it weird because you can use bonus action offhand attack before the attack action is taken (if it all). Off hand is contingent on Attack action being used as the action. They also dont let you do sneak attack damage on attack of opportunity, which you can do. Because of their attack flow, and that if you forget to click it both main and offhand are used in 1 attack, it would be nice to just split all 4 attack into different attack as what weapon you are using matters and it allows you to dip or whatever you want to focus on a particular one.