Still don't see what thats got to do with playing Midfield. Some of the best CM's have been fairly slow, Xavi, Alonso, Yaya are all slow starters (acceleration) but have been lauded as the best in the world at different times, and that just within the last 5years.
This is a major tactical flaw in the management if they think a CM is just someone who is supposed to run round like a headless chicken at full pelt.
And that doesn't explain the use of Lucas in the position Can would be employed, who by all accounts is alot slower than Can.
The only reason Can is being used at CB is because they others are either injury prone or just ****. Any other reason is just to save face that we haven't been able to buy a decent CB pairing over the last 3 seasons.