I really like this game, are the mods worth it?
In short yes, Waifu, beach, gren and bopit are all great mods that add varying degrees of extra gameplay for no negative impact, they are simply extra content to enjoy should you want to.
Waifu is the longest of those mods, adding extra learnable moves from an additional NPC, an angel with three fights, including one that is right at the end game level of difficulty right now, easily in the top 5 hardest fights in the game, a loli cowgirl with a milking fetish and an extra set of dialogues for Mika ect., very nice mod.
Beach adds the beach area( who'd have thunk), which is a little harder than the forest but around the same level, there are a pair of bosses that are quite a bit harder but in total you can expect 4-5 more unique fights, or something like that, plenty of content to enjoy with pretty good quality writing.
Gren is a standalone encounter in the forest, she's a bit harder than the rest of the forest denizens but not by a huge amount, she has a lot of content, not loads but plenty if you appreciate frog girls.
Bopit is a really interesting mod that adds a quest in the caverns for you to retrieve the bopit, the fight itself is very much a simon says sort of operation that penalises you for being too slow or not following orders, honestly it's one of the more interesting fights in the game and must have taken quite a bit of effort to get to work as desired.
On the whole, mod it, it's just extra content, just back up your save before hand to be completely safe, mods can rarely interfere with a new version, or rather the new version interfere with the mods, this hasn't happened for a long time but i do wonder if the balancing update could throw things around a little, as it deals with the games back end rather than just adding content, though that is only me being a pessimist.
There is also the gamebreaker mod that adds an item that is designed to make the MC so overpowered that you can breeze through the game and just enjoy content, worth it if you're forced to start a new playthrough and have had enough of grinding levels to get back to 50.