Ya know, we all have certain experience and that is all. A lot of folks are really OK with what they got and have never experienced something different. It is easy to say one thing is great if you have never had anything to compare it to.
Common sense tells us that the longer the bow, the less acute the angle is when we pull it back, and this is especially true for long draw guys. If you have no issue with string pinch (caused by that acute angle), then go for it. If the bow holds together on that long draw, it will be great. That stress on the bow is another very real potential with pulling it back that far.
I am guessing that many, maybe most of the folks here might tend to steer you towards a longer bow. OK, not necessarily 70" but certainly 62" and up. If 62" is a short bow for you, try one. I draw 30.5" and am very comfy with my 62" recurve. You may even be better off with a 64" bow.
I have experienced finger pinch in the past and don't want to deal with it. It hurts after a bit, it screws up clean releases and causes you to get upset at your shooting.
For several years I have been eyeing a short 52" recurve for bowfishing out of my kayak, but just can't get past that for certain string pinch at my draw. So I use what fits me best.
Those include longer bows from 62" up to 68".
ChuckC