What talents, what bonuses, and what equipment?
All of the ones that involve STR. =P To be clear, I don't mean "don't work as intended" as in "bug", I mean "no longer fulfill their purpose in gameplay." You no longer gain physical power or weapon damage from STR, so STR no longer makes your character better in those ways, and talents, bonuses, and equipment which grant you STR no longer do the things that STR does.
Races that have +STR -MAG are now purely bad, and races with +MAG -STR purely good, for Wardens rather than being a tradeoff. The prodigy that grants +40 STR no longer boosts your melee damage. A lot of equipment that's meant to be good for a melee fighter has a STR bonus, but it doesn't improve the melee damage of your Warden. There are some artifacts that have altered stat bonuses to be best for hybrids, like a longsword that has 20% STR and 80% MAG damage bonus instead of 100% STR. Those special artifacts are no longer special for Wardens, because Strength of Purpose makes all swords 100% MAG anyway. Likewise, artifacts that give bonuses to both STR and MAG - and therefore would have been unusually good for a character that both casts spells and fights in melee - are instead mostly no better than artifacts that just give MAG.
Mindslayers can do something similar, where they use WIL and CUN in place of STR and DEX to determine the damage of the psionically-wielded weapon, but it only uses part of their WIL and CUN, and they still require STR and DEX to satisfy all equipment requirements. Instead of having one stat completely replace another, they get a sustain which adds a +STR and +DEX bonus based on their WIL and CUN.
If, rather than a talent that uses MAG in the place of STR for many calculations, Wardens had a talent which gave a STR bonus that scaled with your MAG, Wardens would still have a talent that lets them use a high MAG to improve their ability to wield melee weapons (and make it easier to play a class that requires many different stats), but every other STR-related effect would still work for them. I think that would be an improvement.
I don't want to discourage you or be inappropriately negative, because there's a lot of good work in these changes - I very much like the new Threaded talent categories for Wardens and the explicit support for switching frequently between ranged and melee combat. Criticism is a part of playtesting, though, and I have to list what I didn't enjoy in order to help.