???? You mean possibly changing it back to 30 days? Has been discussed but nothing confirmed. It won't make any difference , if OP is stamped in for 60 days.
you used to only be able to apply for a 60 day tourist visa, from UK, within 3 months of travel. I'd wait and see if they reduce the 60 day visa exemption back to 30 days. If you submit all the documents correctly, evisa is processed very quickly. Try applying 4 weeks before your travel date, if necessary.