Thanks for confirming I was reading it correctly. I'll keep an eye on the transaction fee then and wait until it drops.
Since all you want to do is migrate, it's enough to export the private key from multibit classic and create a wallet in Electrum with that key. I think that you did that and it that case you have plenty of time to wait for the best moment. I think that even 50$ fee is high and in your case can be avoided.
I use to watch the graph at the bottom of this page:
https://btc.com/stats/unconfirmed-txWhen the mempool size becomes very low (let's say under 5MB?) then it's your moment to consolidate your inputs / transfer your Bitcoin. Then you'll be able to play with fees like 10 satoshi/byte or even lower.
Since SegWit is now activated, I expect the mempool drop fast, so the 5MB is, hopefully, less than 2 days away.
Edit: on a second thought, it may take longer than the initially estimated 2 days...