If we were to delve into the weaknesses of both species, i'd wager that many of the traditional ones would still stand, i.e. Vampires being weak to sunlight, fire, blessed silver white ash tree stakes/arrows to the heart, & blood deprivation. Some of them such as an inability to cross may water may not still be in effect, as Ghost mentioned there being rain in the first post without making it seem like an issue, and whether or not church grounds and requiring permission to enter a house being issues remains to be seen, just as it remains to be seen whether the vampiric OCD* weakness is in play. It's safe to wager that things such as silver (both blessed and non blessed), wolfsbane, and fire would still cause issues for werewolves, though as Mafia mentioned, wolfsbane would be more of a severe allergen than it would be fatal, though it stands to reason that too much of the stuff might send a lycan into anaphylactic shock much like any allergen would. Depending on the lore, wolfsbane might also be used to cloak oneself from the sharp nose of a werewolf, though it would likely be a balancing act as too much could alert a lycan to the plant's presence, and too little would give away the wearer's scent. There may also be an issue with younger lycans having extreme difficultly controlling their blood lust and older ones having learned to curb (but not fully tame) theirs. This is all speculation on my part of course.
**In some lore it is believed that one can avoid a vampire attack by spilling a large quantity of rice or salt, as vampires are strongly compelled to count the grains due to obsessive compulsive disorder. Some villages still practice leaving piles of rice or salt outside of their houses to avoid attack.