@mmmetaphor
1) hmmm, i will take this as a simple comparison:
land: vindicate--yes, pulse--no
single non-land pernament: vindicate--yes, pulse--yes
multiple non-land pernament (same name): vindicate--no, maelstrom pulse--yes
althought both cards can hit non-land pernaments but in application pulse gave you board position that will take you a lead in a game, can knock down not only tokens but couple of copies like tarmogoyfs or pernaments that are so annoying like chalices for X=1, X=2 you can hit them, that is the power level of pulse over vindicate, screwing lands are not that so typical today cuz many decks run many lands :)
2) against dredge, if that is your MB that is OK, if that is your tutor targets that is OK as well, but i dont like loaming shaman it is only 1-time use unlike in ooze you can hit their DR targets and etc.