General info

Vanilla Wolfven Hour is probably the most useless potion in the game. In addition, its effect becomes completely meaningless when using mods that remove the item levels.
The goal of the mod is to improve Wolven Hour so that it makes sense to use it in certain situations, like regular potions. The added new effects should make it less narrowly focused and more useful overall.

List of changes

1. Recipe.
Wolfven Hour now can be created. You can find a new recipe from a herbalist near Oxenfurt or druid herbalist near Gedyneith on Skellige. Its price is about 1000. Of course, you can add it via the console (item code 'Recipe for Wolf Hour'). To maintain the concept of an "extremely rare" item, the recipe was made quite expensive in terms of ingredients required.
The potion remains a consumable item, so refill will not work. You will have to create it every time. The recipe is placed in the quest category of alchemy menu list.
Note: Wolven Hour does not work with quick slots, only from the inventory menu. The same goes for Clearing Potion. This is a feature of the vanilla game.

2. Potion duration.
The duration has been increased and is 2 hours.

3. Changing effects.
3.1. The vanilla effect has been enhanced. Item level requirement reduction increased from 2 to 5.
3.2. Added a new effect. The effect of the currently equipped trophy on Roach will be tripled. For example, 5% bonus gold will increase to 15%.
3.3. Added a new effect. Inventory weight limit will be removed for the duration of the Wolven Hour. The implementation is similar to a No Inventory Weight Limit - Next Gen - Over 9000 - total weight of the player's inventory will be set to zero, the maximum weight will not change.
Note: You can enable the permanent remove inventory weight limit. To do this, change the function value in InventoryWeightConfig.ws.

4. Item description has been changed.

Unpack "modWolvenHourRework" into \mods folder and "dlcWolvenHourRework" into \dlc folder. Use Script Merger if necessary. 
To uninstall delete these folders. The mod does not affect saves, but will leave Wolven Hour recipe learned after uninstall.

Compatibility with other mods

Incompatible with mods that allows to refill Wolven Hour like that one.
Compatible with Additional Perks, but merging temporarily requires manual editing.
Using this mod in conjunction with other "no inventory weight limit" mods does not make much sense in my opinion, but is technically possible.

File information and other

Version 0.1a is relevant for game version 4.04.
Mod edits files listed below.

Credits

Thanks to ElementaryLewis for general help.
Thanks to glassfish777 and rfuzzo for permission to use ideas similar to their mods.