Actually, in the podcast, when asked about the subject, Todd Howard said there was no spellmaking. Though keep in mind, the way he said it was that at the time, they did not plan to do it, unless they could make it work well, implying that we MIGHT see it, but only if they can do it well, which is a notion I agree with, if your going to do something, you should do it well, and I certainly wouldn't complain about having spell making if it can be done in a way that actually allows for unique and interesting spells, unfortunately, Bethesda has never succeeded at doing so before. Could they do it in the future? Maybe, but I've been shown nothing to indicate they can, as I've yet to see a single game include spell making and also have a good magic system, though considering that the only games I've seen with spell making in are Elder Scrolls games, that might not necessarily prove anything.
I understand your point about it imposing limitations IF you use the stock spells you find in-game and they're not powerful enough. If Spellcraft were a skill, it could solve that. However, that's out. As for using it in a way that works with the new magic system, I think it could be done with balance if regular stock spells level with you, and you get to craft better ones as you get higher up. Then power is equal between stock spells and craftable ones. The craftable ones just get to be more unique.
I would love to see that compromise implemented, and it would make everyone happy, IMO.
Skill merger is fine. With the new way you level, I'd say it's a requirement.
Spellcrafting worries me though. have the mentioed if item enchanting is also gone the way of the dodo? I know both of them could easily be abused to make overpowered skills/items/effects, but it had a ton of roleplay value. You didn't HAVE to abuse the enchanting and sppell making.
Halberds/Polearms are likely in, not necessarily "spears" exactly. Unconfirmed, but very likely based on concept art.
The new skill set will make gameplay smoother and better, IMO.
Yes, enchanting is in as its own skill. Abusing spellcrafting wouldn't be an issue with Skyrim's "fire-for-effect" leveling system. No more boosting.