Hello and welcome to the wonderful world of FFXIV \o/.

1. Forum activity I find varies from time to time and it depends on language of the forum for example the English/American Forum is move active in the afternoon once people are off work and are at home.

2. Glad t see your enjoying lancer *later on it will be Dragon* and yes it will get alot more complicated as you learn more skills and Dragon has 2 rotations, the thing about dragon is it wont all fall into place once you about high level and you start learning jumps. Impulse Drive yields more damage on it's own but the True Thrust and Vorpol Thrust as a combo will deal more damage. If you like in your Vorpol description you notice it also mentions Combo potency, that is the potency it will have IF used as a Combo from True Thrust.

3. No sorry XIV dose not have this feature.