1) It has to come from your payroll, so just figure out the percentage to contribute, then change back to zero when you are done. For some reason, most systems seem to be percentage omit.
2) Who knows what surprises they have in store? Frankly, this seems like it would be a less controversial change, but I guess since it doesn't affect current taxes, they don't care?
3) Most anti Roth sentiment is in the Roth vs traditional debate. Was there something you saw about Roth vs taxable?
4) If you immediately roll over your contributions, they will be accessible from your Roth IRA in 5 years. Can you make it through the next five years without this money? Our plan is to keep contributing as long as we can. If we think we might be coming up short, we might not contribute the last year. That seems highly unlikely right now.