Given a potential alteration-to-6e context? Personally, I think dropping skills to 4/level would be about right. Maybe even 3/level... that would accelerate skill development noticeably from current state and have the nice synergy of being the same cost to start a new skill as buying a new knowledge skill.
But that's a band aid.
I think, in theory, it's actually fine to have the skills and attributes cost the same to advance. 1 point in either still gives the same net result in a dice pool, after all. Yes, there's a valid point in that certain attributes flatly are more valuable than skills... but that's imo because skills weren't better balanced, nor were there sufficient ways the weight of a skill was made relevant.
Which is better? spending X karma to advance Agility 1 point, or the same amount of karma to increase (insert skill here) 1 point? As things are, it's virtually always better to take that 1 point in Agility if the karma cost is the same, because that same die can be used across so many skills as well as in potential attribute-only tests, to boot. Frankly, there needs to be more cases where "agility" skills use something other than Agility. Athletics has the example of being "agility", but linking with Strength in certain cases. Skills would be much more valuable, karma point for karma point, if they weren't so strongly linked (or arguably, implied to be linked) to an unbalanced assortment of attributes. Take Close Combat, for example. You roll STR instead of AGI when you're trying to smash or break through a barrier. That's not enough reason to bring any kind of parity between the decision to invest in Agility or Close Combat. But if the GM can insist you have to roll STR instead of AGI a large amount of the time (with a big weapon, whenever you're fatigued, whenever you're trying to knock someone over, etc etc etc) the value of putting a point into Close Combat goes up dramatically, as that die will always be available no matter what attribute is being invoked. Similarly, there's a few mechanics that key off the number of skill ranks (teamwork, dodging, blocking). If there were more of those kinds of rules, the value of investing in skills would also increase in relative value.