I feel like they could've made Venat's motivations a much easier pill to swallow if she had simply gotten her memories wiped as well, so everything she did was strictly with knowledge of the now, not of what was to come.

Alternatively, they may have been able to present Elpis as an untouched relic of the Ancient world (Which is what almost everyone seemed to think it was when it was initially shown in pre-release material) to avoid the time travel entirely, though it doubtless would've made for a less intriguing zone if we were learning of the past strictly through records and perhaps Echo visions.