Ok, I've re-read all the posts made at least three times, and now wish to synthesize it all.
- Everyone agrees IF1 & IF2 are no-brainers, which isn't good in itself.
- The idea of "expiring" IF was the most used alteration to it, aside from simple number-changes.
- For players beyond levels 70 or more, the current IF gives ridiculous amounts of HP, even more so if the player decided to use IF3 & beyond.
- Don't forget IF is a requirement for Regen.
Although it would imply non-trivial changes to the game code, I like the expiring IF too (well, less than my own idea, but let's not be selfish).
- If we had IF give roughly 4 times what the HP @level-up bonus gives (that makes IF lasts 20 levels), but spread across level-ups, 1HP per level, I think it would make IF almost equivalent to the AC & BC skills (untill HH joins them too

). The 4x ratio is higher, but as it is not an immediate win, you have to wait for it to apply (and going from level 5 to 25 is not immediate, especially for beginners).
- Don't change the levels required for IF, so no impacts on regen. No change to the HP required for regen either (forcing you to spend some HP level ups for regen).
- People not heavily investing in IF will not gain ridiculous amounts of HP, making high-HP builds a true commitment to IF.
- IF1 & IF2 would give players 40HP total. You either want not much more and invest on level-ups HP, or really commit to high-HP, spending a lot of SP on it.
- The HP gains do not grow if you take IF asap (once every 15 levels): you either gain 1 or 2 HP at each level-up.
What do you think of that ?
---On to the other concern:
Combat speed is indeed another almost-no-brainer. There are cases where it is not as valuable as IF: tanks, with high BC, high DR, and two-handed weapons and AP maluses giving them 7+ AP attack costs. But the big difference with IF is that there are no other way to increase your max AP than this skill, while HP has the level ups. It bothers me less than IF.
@ctnbeh13: indeed some in-game, scenarized explanations of the game system could benefit new players. Maybe some kind of hermit living in the woods close to Crossglen that give hints (and eventually tutorialesque quests) that the player can take as some kind of mentor. He would give you new advice when you reach higher levels, like about critical hits, skills, maybe even respawns... And for later levels, get more hints from other NPCs like Lodar or students in BWM.... but this is another topic.