I'm in the process of pulling the entire system apart, breaking traditional class features into feats, creating a Technique system with more than two dozen techniques, ignoring tradition and the man at the gym to make it possible to build an effective version of anything from 'punchy dude' to 'incredible hulk who smashes the ground when he misses, grabs and throws enemies across the battlefield and finishes with a thunderclap' and have them be balanced against each other. Monk Archer Ranger, thug rogue -- all got consumed by the Combatant.
Then I went and made magic, masterwork and tech weapons for them to use, with abilities that change how you play by enhancing what you already do or giving you even more versatility. Oh, and there's not empty +X. Every superior weapon actually does something.
I gave the Combatant a reasonable amount of skills too.
Then I grabbed the Rogue. Usually the most balanced class in any edition, I unmarried them from Trapfinding and Sneak attack, and opened up their options with skill tricks and gave them access to Techniques as well. On top of that, their feat loadout now includes anything that can be considered seated in Skill, including improvised weapons, woodcraft, trapmaking, chemistry and device users, acrobats, etc. The Rogue ate Ranger, Alchemist, Artificer.
Then as for the other classes, I made it easy to steal their stuff.
Want a spell? Take a feat. Now you have the spell.
Want the ability to channel divinity? Take a feat. Now you can channel divinity.
Bardic music? Feat.
Rituals? Feat, then buy them.
It goes the other way too. Sneak attack die? Feat. Weapon of Choice, armor or weapon profs? Feat, feat feat.
I'm making martials feel better by making everyone feel better by making it possible to build exactly what you want.