All this said, I'd prefer if SR5 were quite a ways off, but if it is just over the horizon, my suggestion to the design team would be to leave attribute + skill as the way to determine dice pool, with the cap on skills being removed. Instead of only 1/3 of d6 results producing a successful result, a floating TN of a base 4 modified by various factors would be much preferable--things such as range and other stuff could affect that target number with smartgun systems still adding 2 dice. In order to prevent ridiculousness, setting a minimum target number of 2 would also be good (further positive modifiers being there only to mitigate negative modifiers).
OK, so every player would need to memorize two tables instead of one...one to modify dicepool, one to modify target number. I also remember 2nd edition with tasks with TN 23 etc...this adds nothing to the gameplay but frustration.
Instead of removing caps from skills, Id rather see system where skills are linked to the attribute the way attribute somehow caps max for skill...thinking about characters with Agility 2 and Wing Chun 15 is realy funny...also this can cap dicepools at some reasonable level...dice fetishism with 20+ dices is a good source of jokes about shadowrun 
Other things you said...Ive seen you using this arguments before, we would have to agree we disagree 
If you'll read what I said on the note of target numbers, I said that the TNs should never be higher than the max result on a single die, but increase the number of 'hits' required for success after reaching that point.
As to dice pools, you'd be unlikely to reach 20+ dice pool sizes until you've gotten a significant amount of karma under your belt, at which point you should be able to blow any simpler task completely out of the water.
As to multiple tables, how does smartlink adding 2 dice still, but all others affecting target number require memorizing two tables?
If necessary, a rule could be placed into char gen to limit the
initial maximum rating at generation to 6 (which I can understand). I just don't think that 6 should be the absolute maximum skill rating period. (After all, by the rules, you can't buy gear higher than rating 6 at char gen.)