I didn't know anything about the Berry & Stewart posts you mentioned but if I had I still wouldn't have cared about their not appearing. Good on Marvel for faking people out - it's practically impossible to walk into a theater anymore and be surprised by what you see on the screen. I'm still laughing over Channing Tatum's insane Cajun-French accent and am SO glad I didn't know about it beforehand.
Having the X-Men show up at the end would have been too much and upstaged the leads. It was never going to happen. This movie was about replicating Reynolds's/Deadpool's raunchy success for Fox in the MCU/Disney world. That was it, full stop. Mission accomplished.
BTW, you
digest? What did you eat that was so great you had to mention it in your post?