Technomancers, Adepts, and Mages only get better at their core concept through use of Karma. Nuyen helps them get axillary tools, but doesn't really help their core concept. (Well, focuses, but I've very rarely actually seen characters who use them.)
Riggers, StreetSams, and Deckers all get better at their core concepts through use of Karma and Nuyen.
Whereas a Mage has to stretch karma between spells, skills, Attributes, and Initiation, and gets very little from Nuyen; a Rigger gets cooler Drones with Nuyen and upgrades his Skills and Attributes from Karma.
My concern with increasing the Nuyen available in Character Creation is that it does make the Awakened Concepts much less valuable. Normally, sure, they have their sweet spot early in the game, and yes, they're generally more powerful than non-Awakened characters in early game. But a few runs later, those powered by Nuyen catch up. Late game is when Powered By Nuyen (PBN) outshine those who are Powered By Karma (PBK).
A time comes when a PBK character doesn't need anymore Nuyen, and they're just waiting on their next Karma grab. PBN characters never do.
Street Level is optional, that's the ridiculously low. (And ridiculously fun!) The standard chargen isn't ridiculous by most people's standards.