It sounds sensible to me... focus on behaviors, skills (or whatever taxonomy you plan to use) and make them about as specific as is needed, without restricting a behavior to a tool that's presently being used for it. You're right in saying that communication skills don't necessarily depend on the tool used: even when humans used drums or smoke signals, they still needed to master the skill of asking questions, answering them and exchanging information in an efficient way.
Same goes for computer skills: tool-related stuff can be managed in in-course tasks (being able to store a document made with MS Office Word on a laptop by using the short key Ctrl-S), whereas the skill 'I can create, edit and save a text document' would be handled in a competency framework.