Deckers still don't get Complex Forms or Sprites.
And I'm betting Technomancers still don't use agent programs.
What I mean is, if the matrix rules are as streamlined as I saw in the SCN demo, then aside from the agent/sprite split, what will define a Techno from a Decker in a meaningful way?
I don't mean to be snarky, but I wonder are you familiar with how they're different in 5e?
TMs: In addition to matrix actions and a free (in nuyen) Living Persona, they get "spells" and "spirits" and "initiation". They're called Complex Forms, Sprites, and Submersion, but they mirror the magic mechanics.
Deckers: No "matrix magic", but they do get to run cheap programs and easily reconfigure their programs and ASDF array. These are both because they use cyberdecks rather than a free Living Persona.
Not to be snarky but in 5th Edition there is very little a Technomancer can do that a Decker can't (Matrix-wise). Different ways to get there, but there isn't a difference in the outcome. A Device is Controlled or Bricked. An NPC takes Dump Shock or gets fooled. A Decker uses a combination of Matrix Actions to accomplish the task, a TM may have a Resonance based short cut or use the exact same Matrix Actions.
Off the top of my head Diagnostics power, Resonance Veil Complex Form aren't easily replicated by Matrix Actions, but can be done using other skills. (Leadership, Con, Impersonation, ect...)
IMO it would be nice if TMs had more toys like Diagnostics so you'd have a meaningful mechanical difference in capabilities. As far as most Runner teams are concerned a Hacker is a Hacker. TM or Decker makes no real difference. YMMV of course.