It's not a modern rod, but still a very competent rod which will be significantly more through actioned compared to the Oracle, may almost feel 'wobbly', but that's not necessarily a bad thing.
In answer to your questions:
1. Its a very different rod and it will make you do many things - one of which will be to slow down, which I see as one of the biggest casting faults with d/h rods. I'm not saying that is a fault of yours Jim - it is one of mine - but I am saying that being able to use the Amorphous Whisker well can only be a complement to your other rod and the rods that will follow.
2. Tough one. The rod will deal with everything from a Skagit to a long headed 'Spey' line, I think it's more a question of what you want it do for you. If it were me, I would match it to two lines, most likely a l longer headed shooting head (possibly a Mackenzie) and a mid-headed Spey line (say a head of 55'-65''). When that rod came out, Skagit lines and indeed shooting heads as we know them now, were not so commonplace, so Spey lines are the natural match.
However, if I'm honest (and noting that I am a confessed tackle tart etc) I'd say that the money that you might spend on equipping the Amorphous Whisker with reel, lines, backing etc. might be better spent on further time with an instructor building confidence and knowledge in what you already have, which is a competent all-rounder outfit.