I think the 350 fps market can be pretty big.So 355 fps With a 400 gn arrow,but narrow and light. There will be a market for it but not a huge one. Smaller and older hunters. I think most of us want 400 fps with a 400 gn arrow. ( or faster) Pin are you not shooting their 470 fps xbow?
We are a different group here on CN than most crossbows hunters. Most crossbow hunters do little research, will go and buy their bow from the big box stores that look and feels cool. They just want to kill a deer.
I personally just want to hunt and kill deer with mine. For this reason, I chose to use 110 lb draw weight Scorpyd. It is much easier to cock while on the stand. It is much quieter and easier on components than the high poundage faster crossbows. It is also way easier on targets.
I bow hunt because I love the challenge of getting close. Have never taken a shot over 30 yards, but that is just me. I use a large cutting Grim Reaper broadhead and can't remember ever not getting a passthrough with a 400 gr. arrow. For these reasons, I'll just stick with 110 lb limbs on my Scorpyds.