the forum is probably the wrong shape for this. engineering leaders who'd give you real positioning feedback aren't sitting in a place where people ask for positioning feedback, and the places where they do gather will punish anything that sounds like marketing, which is signal but not feedback.
what's worked better for me: pick five engineering leaders you already have some connection to, fifteen minutes each, and don't show them the deck. describe the problem in plain language and stop talking, then see whether they finish the sentence for you. if they do, your positioning is right and you just need to write down what they said. if they redescribe it as a different problem, that's the actual finding.
the other test that catches most of it: could this person repeat your line to their own team to justify the spend, without you in the room. technical buyers rarely buy alone and messaging that only survives with you narrating it dies in that second conversation. happy to give it a read from the selling-to-technical-buyers side if that's useful.
