Multi Algo means that each algo has it's own difficulty level according to it's hash rate
So Scrypt for example could have a difficulty of 4000 if there is a lot of hash rate on it.
But x11 or other algo's could only have a difficulty of 25 if there is not much hash on them.
Meaning ASIC machines are not holding VERGE ransom with their huge hash rates. (sometimes half of LTC & DOGE Hash rates)
There will be less coins for ASIC Machines to mine, because other Algo's will take a big bite into the ASIC Pie.
If China throw huge hash on to VERGE, they will not freeze the Blockchain because the other Algo's will solve Blocks and keep things moving.
Now there are x11 ASIC miners So i would vote against x11 to add as a possible Algo.
maybe 1 day all Algo's will be ASIC,