The first sentence you provide, I assume is how you wrote the sentence originally. I don't find it particularly presumptuous. I see it as confident and maybe a bit overly confident. However, I like the suggested revisions a bit better since they soften the tone a bit. Either of the two suggestions are good. The two suggested revisions soften the tone because they more politely acknowledge the positive feedback of the two linguists and they show a bit more humble approach to pursuing publication. Either one would be a good choice and would depend I think on how they fit with the rest of your essay.
I hope this helps.