Some FX have very very long parameter names. As an example MMultibandReverb has "Band 1 - Equalizer band 3 - Harmonics semitones 3".
In Reaper, a parameter envelope lane displays "MMultibandReverb: Band 1 - Equalizer band" and a TCP parameter control knob displays "Band 1 - E". As can be seen here (with a trail leading to the actual parameter):
... Big pic:
https://i.imgur.com/I5KYaEI.png
It looks like the maximum length of the parameter name is 24 characters, and I suspect that that is driven by the layout of the Automation window. And currently it is almost impossible to choose the correct parameter from the Automation window or the FX parameter drop-down lists.
Suggestion: show the last 24 characters (often the most significant) in the ECP name, the Automation window, param drop-down lists and elsewhere.
This is certainly achievable, as shown below. I Aliased the parameter but why not do it programmatically ?
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Edit: added
As well as the above, how about this idea?
When I hover over a name that is too long for the available area, scroll it.
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FR Discussion thread:
http://forum.cockos.com/showthread.php?t=157719