The overly shielded pick up can be de-shielded to make the oil flow more efficiently with no ill results. I don't think it will make more power in its own regard.
Matching the oil pump inlet is a good way to free up lost power with no ill result as well.
The only benefit the windage tray provides is solving any oil starvation issues in corners. Such is the result when people remove their balance shafts and keep the deep pan. Simply switching from a 2.5 oil pan to a 2.2 oil pan will result in less sloshing oil when balance shafts are removed.
Matching the oil pump inlet is a good way to free up lost power with no ill result as well.
The only benefit the windage tray provides is solving any oil starvation issues in corners. Such is the result when people remove their balance shafts and keep the deep pan. Simply switching from a 2.5 oil pan to a 2.2 oil pan will result in less sloshing oil when balance shafts are removed.