I have gone shore diving (in Hawaii) with full foot fins. I always wear neoprene socks with mine and the place I went (Ho'okena on the BI) was no big deal. Of course, some places, you are definitely going to want proper booties or boots. But, for some "in between" shore dives, these neo socks with Kevlar soles could let you do shore dives with full foot fins pretty comfortably:
Rock Socks with Kevlar Soles | MAKO Spearguns
Disclaimer: I have no affiliation with Mako. I am just a customer who loves my Mako freediving fins and neo socks (mine are regular - I don't have the Kevlar ones).
Rock Socks with Kevlar Soles | MAKO Spearguns
Disclaimer: I have no affiliation with Mako. I am just a customer who loves my Mako freediving fins and neo socks (mine are regular - I don't have the Kevlar ones).