Question About Limits Options

[Faelan]

So I have finally decided to dig in to the 5th edition and while I like how many things were basically cleaned up I am having a problem understanding the underpinnings of limits, or rather the why, and how some of it works. Just to be clear I am not saying they suck, I am not trying to start some sort of edition vs. edition argument, I just want to get it, or at least feel like I am on solid ground if I decide to toss it out the window.

1. Do limits apply to the base hits or net hits?
2. Do you get to roll all your dice, total up the successes and compare them to your opponents successes to get net hits and then reduce them if you are over your limit, or do they reduce your hits before you compare results?
3. What was the reason for implementing limits?
4. Don't limits emphasize attributes over skills?
5. How is it even possible for the runners to take out a high force spirit or dragon now? (not a common event certainly, but I always liked to know both as a player and a GM that anyone can meet the reaper, the way it stands now it seems like only really bad luck for the victim and really good luck for the attacker will do it). Just burn Edge you don't have?
6. Accuracy is irking me, why would you use a tool if it in many cases restricts you to a limit lower than your limit without it? I mean the point of a tool is to make things possible or easier, so why use these tools.
7. Is SR5 more of a Magicrun since Magic is the only thing without a limit?
8. Any house rules for the above?
9. Am I better off taking stuff I like in SR5 and transplanting it to SR4?

Any answers or recommendations would be greatly appreciated. Basically as I see it right now SR5 gives with one hand while taking away with the other, so it worth investing in the new game or not both from a time and money viewpoint?