Is there a way I can do this like the Cubase users can with VST Expressions?
Yes, the Audiogrocery Logic X Toolkit PRO offers two Expression/Articulation Map tools.
Watch the Videos in the site or download the AM-PRO documentation.
Here are the major problems in Logic which AM-PRO solves with ease.
For example with Articulation Key Switching Instruments:
1. Keyswitches do not chase.
2. Keyswitches cannot be labeled.
3. Keyswitches are transposed with their region when region parameters are
altered.
The AM-PRO is based on Logic Track Based Automation so the KS chasing is
perfect, you can label the KS using text names "Sustain", Pizz", "Tremolo"
etc, the MIDI Note/Region transposition does not affect the Logic Automation.
AM-PRO Maps can trigger Key Switch, Program Change and up to 4
CC per shot. The upcoming v3 will support two dynamic Key Switches (per Map), powered by
a smart KS latching technology supporting instruments like the Sample Modeling ones for example.