I have bound “Move Only” to RMB and a skill to LMB. For moving around and using the skill, this works as expected. For various non-combat actions (picking up / dropping loot, talking to NPCs, changing skills, etc.) the behaviour is not what I expected. I would either expect that these non-combat actions must still be performed using LMB, but when doing so, the attack is not performed (or maybe that these non-combat actions are now also bound to RMB).
However, inside the game these non-combat actions are still performed using LMB, but the attack is performed in addition. This results in my character pointlessly attacking piles of loot and NPCs I’m trying to talk to, wasting time and (depending on the skill) mana and breaking immersion…