I ride hard enduro trails as well, my first preference, also race enduro on non assist bikes.
My race bike this season was a '18 Specialized Enduro 29 with a Fox 36 front and Float X2 rear, so quite capable, last year was a Yeti SB5.5C. The Commencal Meta Power 29 is every bit as capable as either bike, especially with good tires and inserts. Tires and if you choose inserts become even more important on an Emtb due to the heavier chassis weight, way more load transmitted. Anyway the Meta Power 29 even though it only has 140mm of travel uses it very well and the kinematics seem to be quite progressive so it handles the coil very well. I have not had a harsh bottom out event and I've definitely gone full gas on it.
I feel the same way about sticking with 29 for my non assist bikes and wanted to keep the same feel on my emtb as I use it as a training tool to get more descending time as I don't have time to shuttle or do many lift assist park days due to having a young family, etc. I personally don't like the vague nature of plus tires although the 2.8 stuff is getting better. I can't stand sidewall deflection or folding so I have to run pretty high pressure in plus tires to get them to feel good when cornering so then they aren't great elsewhere. I haven't run tires wider than 2.5 with a insert and that might make a big difference. Personally I'm happy with the 29 and don't wish for more rear travel. My main wishes are a water bottle cage and more battery capacity. One of those might be solved and well battery capacity is fine for me for 90-95% of rides so I'm pleased. Price to performance is very high with the Commencals, that and because their US distributor is 15 minutes from my house is why I chose the Meta Power.