Proper glueing requires good cleaning of the involved surfaces. So most glues wont work too well in the field anyway. Hot glue is no exeption. If you practice with a lighter it is not very hard to use. The temperature of the glue is essential. Too cold and it wont stick, too hot and it will pyrolyze and not stick either. The temperature of the glue can be estimated by judging the clearness (that what takes practicing). One major advantage of hot glue is that it is solid and can be kept in small chunks. I still think it is not worth the effort to carry it.
BTW: The super glue should not be used to close small wounds in the field. There are too many risks envolved in doing so. When you do a little search on this subject youŽll find that especially members with medical background strongly advise against closing wounds in the field.
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If it isnŽt broken, it doesnŽt have enough features yet.