Different rules for Living Persona stats? Change Resonance priority selection to BCD (similar to what adepts and aspected magicians have)? Maybe make Resonance attribute unaffected by essence loss to cyberware? Or maybe you could make technomancers less skill dependant by letting them use their resonance skills instead of their matrix skills for some occasions?
TL;DR technomancers should need less resources to build so they could afford to interact with the meat world more.
I just want to emphasizes ZB's questions, as they do get directly at the heart of the issue.
Making an add-on to cyberware that would make it not effect resonance or go the other direction of make a mechanic in resonance that lets you negate the effect of essence loss on resonance, under certain conditions. (Like Gaes's back in previous editions) It could work, it opens up a bunch off doors, but it still isn't that helpful starting out.
In the current Cannon, Techno's are seen as huge boogie men, but compared to your average wizard Techno's have way less ability to harm folks. Which leads to a strange but very direct disconnect between the story and the system reality.
I'm not saying techno's should be decker plus, I agree that Adept is to streetsam and techno is to decker. But from the system view this is somewhat harder to pin down, as it by nature can be a solo assignment, which is table disruptive. But the Idea of a techno being the hacker that comes with you on the run and does what the decker does only doing from AR, strikes me as sort of the sweet spot, to aim for. I really think techno's and wireless bonuses are two great tastes that can taste great together. I just am not sure how to make that happen yet, possibly enhance everyone's wireless bonus through something like a teamwork roll?
I don't think everything needs to be thrown out of kilter to make this happen, I think most of the tools to achieve this are already around, if not in 5th then in 4th. My thoughts on where to go with techno's fall mostly into video gamer "archetypes". First Person Shooter (FPS), this would be a techno who's crossed a little into the gunny bunny zone, using init enhancer echos, sprite powers to enhance Gun skill, while still doing some decent hacking. Analogous to the combat decker. Real time Strategy (RTS), more of a mastermind type, like traditional decker; they come along for the ride, but will probably stay in the van, waiting for the team to execute their master plan. Next Social Gamer (SG), This would be the face crossover, socially gifted, highly networked, always tweeting/skyping/fbing uses the fact that Techno's are so MAD to get some mileage out of that Cha and Int. Lastly the MOBA techno this would be the idea of a drone techno, selecting and jumping in and enhancing her/his drone as she/he rolled around and did the mission.
Now all these things are possible under RAW right now they just aren't effective at it. Like adepts in previous editions they need some support, and expanded options.