I recently stumbled upon zhongjiedong's Serenity of Sleep mod, which allows users of Static Skill Levelling to benefit from sleeping again, as Static Skill Levelling makes it so, instead of gaining skill experience, you get a certain amount of skill points per level-up, which you can use to increase any skill at will after sleeping. This causes the vanilla effect of increased experience gain for the Rested, Well Rested and Lover's Comfort states to become completely irrelevant.

The new effects from Serenity of Sleep increase your bartering and negotiation skills for the Rested and Well Rested states, while Lover's Comfort will increase your movement speed and reduce the weight of your armor. Rested and Well Rested seemed fine in my eyes, I just found the values to be far too high and toned them down a lot, Lover's Comfort on the other hand I decided to change entirely.
I can somewhat see why you would be able to move a bit more swiftly and carry a bit more because your character is more motivated after embracing their lover, but for me, it made more sense to instead have an even bigger urge to return to be able to embrace them again, feeling passionate and motivated to achieve their goal or finish their job and return.



Changes:
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Rested (4+ hours of sleep):
5% reduced buy prices  ->2% reduced buy prices
25% reduced bribe cost->10% reduced bribe cost
+10 to Speech skill->+5 to Speech Skill
5% increased sell prices (unchanged)

Well Rested (8+ hours of sleep):
10% reduced buy prices->5% reduced buy prices
50% reduced bribe cost->20% reduced bribe cost
+20 to Speech skill->+10 to Speech Skill
0% increased sell prices       ->+7.5% increased sell prices
(The mod doesn't actually have a sell price modifier for the Well Rested state, despite mentioning it on the mod page,
probably just an oversight by the author, I added it in here)

Lover's Comfort (info on obtaining it below):
10% reduced armor weight  ->5% reduced incoming stagger
        ->5% reduced incoming physical damage
        ->5% reduced incoming spell magnitude 
10% increased movement speed ->1% max health regeneration per second while in combat (0.49% in vanilla and 0.70% outside combat)
(Spell magnitude is a modifier to the effectiveness of a spell, for example, a fireball dealing 50 damage with a modifier of 1.5 would deal 75 damage instead)
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To gain the Lover's Comfort buff, you need to be in the same cell / load zone as your spouse and sleep in an unowned bed or, alternatively, you can also sleep in your marital home with your spouse.



Compatibility:
Just load after Serenity of Sleep and of course load Serenity of Sleep after Static Skill Levelling.



Credits:
zhongjiedong-for Serenity of Sleep