I'm 50 hours into Assassin's Creed Odyssey and I don't even feel like I'm a quarter of the way through the game yet. To say this game is massive would be an understatement. It's easily the best combat AC game I've played so far. There's not that much sneaking, you don't need to always sneak, you can just run into forts and houses and just start attacking. The combat is so much fun that I've been doing that mostly. The bow combat is very reminiscent of the newest Tomb Raider games, along with a lot of the quests and dialogue. Both games are developed by Quebecois companies. I wonder if there is/was a crossing over period of people developing both games, or similarities in styles because of that. The naval battles are pretty fun. Once you upgrade your ship a handful of times with better defense the combat is pretty easy. The weapon upgrades are similar to Borderlands with each item being a new level and you can't use the item until you're that level. Plus there are tiers of weapons like in Borderlands; grey -> blue -> purple -> gold. The best thing about AC compared to BL is that you can upgrade your weapons to your level if you like the attributes instead of the weapon going stale after getting too strong for it.
If you're looking for an expansive RPG to get lost in, I'd recommend this game 100%. It's a mix of Tomb Raider, Skyrim, RDR2, Borderlands and of course Assassin's Creed.