The Photon's pole sleeve could, IMHO, be better.
It appears to be a legacy standoff sleeve with a lot of force directed to the stitching. (top sketch). If it were constructed as in the bottom sketch, the dynamics from the fabric would be directed towards the pole, and into the ground. This is what is accomplished with the "hood", almost an afterthought.
So seam sealing the flatfelled seam with thinned, saturating, silicone is pretty straightforward and effective, but the integrity of the sleeve, without the 'hood' is still a question.