Brammy, I will address your points as a former I-Deas user.
1. The dynamic navigator in NX5 (I think) is very similar to I-Deas. I actually like the sketcher in NX moreso than the one in I-Deas. Mainly because of the dynamic move, and a trim command that actually trims AND constrains at the same time.
2. Drafting is a sore spot, as I mentioned above. But UGS are aware of this from (what I'm gathering as many) complaints from former I-Deas users. What they are developing is called 2D Drafting Plus and it is intended as a stand-alone drafting module for NX7. Also, you may not be aware, but for NX4 there is an NXDrafting you can download from GTAC that is essentialy I-Deas standalone drafting. I never got a chance to use or test this however as we started with NX5. Try it out and let us know because I am curious myself
3. The movement of assembly components is very easy in NX5 (another thing I like better in NX than I-Deas), so I'm assuming the "Move Component" command is not in NX4. Sounds like you are having to use Edit - Transform, and if that's the case, feel bad for you

. I despise Edit - Transform, and it is also worth noting that in NX6 there is a "Move" command that virtually replaces Edit - Transform.
4. The interface I can't really give you anything on, sounds like it's just something you'll have to get used to. I for one love the "updated" style of menus and toolbars that are totally customisable. One tip I can give you is NOT to use the I-Deas role...that may be some of your problem right there.
5/6. Feature tree with branches. You know this was something I too missed at first but I got over it. I actually think NX does the Bushy Tree thing a little better than I-Deas. Why, because you can sketch your "cutter part" in place as opposed to relying on relations to position your cutter part. I do agree that the cut-paste stuff is a little harder to use, but once you figure it out, it works great. Also worth noting here is (as I mentioned in one of my previous posts) that in NX6 they have turbocharged the Reuse Library and believe me, the cut-paste stuff in there is killer and blows I-Deas away.
7. I agree their needs to be a better way. One of the hardest struggle we are having with NX is with data management. We are using TC and while I think it works great, the problem is there is no "Check-out for Reference" type option. Now this can all be resolved (I'm told) through a rather creative set-up of your TC roles and Groups, but it seems like a lot of work for one simple feature. Another thing that helps me out is I think of the NX Session the same way I would a model file. That is whatever you have out in your Session is what is being affected by the changes you make. Now of course it's not exactly the same because you have to re-pull everything out each day, but hey. And I kind of like not having the looooong check out times anymore. I also agree there should be some kind of notification of when an object has been updated or changed, and I'll say it again....NX6 has this feature.
So I guess it's easy to see that Siemens is taking into account alot of I-Deas features, and even though they are not there yet, they are putting that functionality in there. It may not have the same name, it may not even look the same....but it serves the same functionality. So in the words of Red Green, "Remember, I'm pulling for you, keep your stick on the ice, we're all in this together"