What I've done is getting T3nd0s Skyrim Redone.
It makes the combat system infinitely better. No more power attack spamming, and weapon types actually handles differently. Holding the block button is no longer invulnerability mode. Magic is revamped, not only with new spells, but with new ways to play. Like wearing a shield in your left and a spell in your right, spell in left, weapon in right (now with actual benefits), staves can now benefit your other spellcasts, etc. Useless skill trees are now made useful, like speech having perks that affect shouts.
The best part is how the combat has much more importance on managing stamina. Blocking costs a shitload of stamina, but a timed block reduces the cost, increases the damage reduction, and may stagger your enemy. Getting hit without blocking causes bleeding and an armor debuff. Overall, the combat gets much more involved. Running in swinging is no longer really viable. At least not on adept difficulty and above.
It makes the combat system infinitely better. No more power attack spamming, and weapon types actually handles differently. Holding the block button is no longer invulnerability mode. Magic is revamped, not only with new spells, but with new ways to play. Like wearing a shield in your left and a spell in your right, spell in left, weapon in right (now with actual benefits), staves can now benefit your other spellcasts, etc. Useless skill trees are now made useful, like speech having perks that affect shouts.
The best part is how the combat has much more importance on managing stamina. Blocking costs a shitload of stamina, but a timed block reduces the cost, increases the damage reduction, and may stagger your enemy. Getting hit without blocking causes bleeding and an armor debuff. Overall, the combat gets much more involved. Running in swinging is no longer really viable. At least not on adept difficulty and above.