Is your income actually high enough that you would need to use the Roth back door ($117k single, $184k married, after pre-tax payroll deductions)? If not, and you don't expect it to get that high in the near future, then this is a moot point and you should probably roll over to an IRA.
If you do need to use the back door, you'll want to leave the pre-tax money in a workplace retirement account. When you get the new job, compare the fund options in the new account vs. the old one. Roll it over to the new one if the fees are about the same or better than in your current account.
