A couple of other things I have noticed, but may be out of scope for your extension.
1) There's no interrupt for Divine Smite if a Paladin uses the Auto Attack button - the extension just rolls the damage, and the paladin doesn't have the option of using Divine Smite before the attack is resolved. I have another extension (WOB: 5e Helper) that normally provides a pop-up dialogue that allows the Paladin to choose Divine Smite and the level at which it is cast to apply the DS effect before the spell resolves. The pop-up still appears, but the damage gets rolled and there's no way to resolve DS if its used besides manually rolling dice and adjusting the HP of the target.
2) For Weapon Mastery, the Fighter Tactical Mind (where you can switch out Mastery Effects on a hit) doesn't seem to be supported. Again, I have another extension that handles this, but Weapon Mastery needs to be turned off in your extension for it to work (which is fine). Just wanted to make you aware of these items.
3) Finally, seeing this on character sheets with 5e Table Tools loaded and active - it has the Action/Bonus Action/Duration fields overlaid on the Attack, Save, Damage, Effects, Healing buttons. You can actually edit them. In the picture, I have an extension called Spell FX loaded, but I checked without it as well, and the fields remain overlaid on the buttons. They seem to be from the dialogue for setting up spells when you right click to add damage, healing, effects, etc. to the spell item.
Attachment 67972
