The initiative system and Shortbow5 are the reasons that thief can't be strong at actual fighting, which is honestly sad because both of those are supposed to part of thief's profession signature. The initiative system, together with the standard 10sec cooldown on weapon swap basically ensures that there will never be good synergy between different weaponsets while in combat, regardless of the weapon skills. Because unlike other professions, thief's class resource is shared between weapon sets, and a 10s CD makes it extra restrictive when it comes adapting to ever changing situations. With other profs you frequently see an offensive weaponset complimented by a defense set or an utility/cc set, rotating through them to juggle cooldowns and alternating the pace. Even rev with it's energy system regains up to 50% energy on legend swap by default, 75% when traited. Thief, when traited, only gets a pitiful 3ini lol. As a result, almost all meta builds will just have one optimal weapon for fighting, and one weapon for running (sb5). As long as this doesn't change, thief will always be a lesser force. Because from a 1vX perspective, it's effectively fighting with one hand tied behind it's back at all times.