Conjure buff - nonexistent?
Based on the comments at the engineer forum, it seems that the update to make bundles at exotic-level is bugged and not working, so you should not see any difference in pve or pvp when it comes to base damage.
However, the update where the weapon’s secondary stats are applied to bundles should work in pve (all secondary stats in pvp come from amulets, so it makes no difference there). So conjures in pve should now benefit from those stats, like they already used to in pvp. But try to test it yourself nonetheless, with a weapon that adds extra power and one that does not, in the pve environment.