I know how you feel, I have been using all my last lot of SC to lvl all my current units to max of what they are currently (So I am not CCing them AWing them at this stage just maxing their lvls). I was doing this during the down time hoping to have it all done and ready for the time Nutaku take over.
If things event wise do start to speed up with little to no rest period in between events I am really going to have to find a good system to train my units and get a good event unit. Like you said in another post some people are completionist I am no exception sure I want rage quit over not getting the perfect event unit but ever since my team became strong enough to start getting these perfect units I have been going for them whether I want the unit or not.
I hate the idea of skipping a unit as you never know when you might need them (If ever!), I am a hoarder if you will and I feel the need to get all units possible. So far my unit lvling has been going well but I have burnt through a lot of my 70SC stash and cash to lvl roughly half of them, still got a ways to go before I am ready for regular events.