1 - Bladeforged gives you full Charisma Bonus, (Unlike regular WF). If you prefer Fleshie toons, the Fire Angel really is a superior build. You'll need more UMD and your Enhancements will be a stretch, but it's a great build. You can also go Human and get an extra feat - just remember that your healing will be 1/3 as fast as Quickened Reconstruct.
2 - I solo Vale and Amrath on this build, but I usually don't do Amrath until Level 20 (and have access to my EDs). I run in Fire Savant for both, but if you feel the need, Air or Water Savant is a tad easier.
As your first time Sorc Life, it will take a bit of getting used to. You're spamming quick, low cost spells ALL THE TIME. Not many long spell casting times or cool downs - it's a very rapid rotation. Basically FM, SR, MM (or CM depending on the situation) with DBFB and FB thrown when necessary. You've also got the combination of Ice Storm/Solid Fog for CC. Also keep in mind that Ice Storm ALWAYS beats Fire Wall, so if you've got a baddie that likes to cast Fire Wall (Kishnaurac in Deal and the Demon as an example) you can cast Ice Storm close to you and keep Fire Wall doused.
It's really not complicated to play, it just takes some getting used to
(Especially if you're used to: run up to baddie, hold attack button on mouse, cleave, greater cleave, keep swinging while I wait for cleave to cooldown, "HJEAL MEH!!!" J/K)