Top view of tent without fly shows the sleeved portion of the tent roof which receive the poles, which also are joined with press clips to the poles. That double sleeve impedes the setting up of the tent free standing under the fly in heavy rain, but, the tent can be erected without sleeving the poles, and the ten top clipped or tied through the center opening of the crossing sleeves. It would then be erected back to front from under the rain-fly, without exposing the tub tent bottom to material rainwater.
This cropped enlarged close-up of the tent top, shows the pole sleeves which can be adequately bypassed to erect then ten beneath the rainfly in bad wet weather. That would avoid the tent floor filling with water while setting up. Instead of buying another one with full clips, or retrofitting, simply set up the ground cloth and stake it, and cross the poles into corner grommets; then doing what fully clipped tents do, loop either a small caribener at the poles crossing, or tie them with a rope, or compression strap and stabiley erect the poles.
Then drape the fly and dry-unfold the ten inside and clip the tent clips to the poles fron to back from the inside. T hold the tent top upsecure the sleeves center opening with a loop to the same center poles clip. It will droop about six inches at the center -but it its not critical for the weather inside and under the fly. Finish with the rainfly pole. You'll stay drier. Otherwise this tent is waterproofed. The method jsut described works, and defeats the concern of the tne floor getting excessively wet under the mesh tent top. Can also reasonably work a a lite top shelte the same way. After erecting he dry tent inside, secure the stakes and the poles as needed/desired outside.