Welcome to the fold. As time goes by, you'll find that the debates amongst us concerning fixes/changes can get pretty heated at times, but eventually cooler heads prevail.
I do like the idea of unifying the Obi-Wan ghost visual on the Dagobah/Endor scenes. Sometimes he looks just too real.
When Obi-Wan appears to Luke on Hoth, I interpret it more as a vision than an actual physical manifestation. Han practically runs through Obi-Wan and never comments about seeing anything. Therefore, I don't think this particular visual effect needs to be changed. I wholeheartedly agree with you on unifying the other instances of his ghost appearing.
Ady,
Dagobah's looking good!