While MS first-party will be better next gen, they did have some interesting titles this gen. Some were rushed but interesting (Recore), others have so much potential but also flaws (Ryse), there are the underrated one's (Quantum Break, Sunset Overdrive) and the critically acclaimed titles (Ori, Cuphead, Forza Horizon, Gears, Halo 5). I did play most of these on Game Pass, though I had bought some select titles before the service had launched.
Still want to play more of Sea of Thieves, Halo MCC and try State of Decay some day. I'm not interested in Forza Motorsport. Looking forward the most to Halo Infinite, Wasteland 3, Minecraft Dungeons, Everwild, Hellblade 2 and Ori 2 right now.