Hello! Lovely sheet, going to use it right away! I also offer my own small improvement for your consideration:
Checkboxes for blanket weapon proficiencies! This allows space to write odd/unique profs (such as Rogue getting Rapier and Hand Crossbow) while also covering the common "group" proficiencies in an easy and simple way! (Firearms included for backwards compatability with the Artificer's optional Firearms Proficiency rule)
Thank you for making this, have a great day!