I always wish Premiere worked like Avid when it comes to duplicating a sequence, with the intent to continue work. How often does the following happen to most PP editors?
"I want to try something new, but I need to keep this SEQ_01"
DUPLICATES SEQUENCE.
Edit edit edit
"ARGH I've been editing the original sequence. Oh well, the duplicate is now the original sequence"
RENAME SEQ_01 TO SEQ_03. RENAME SEQ_02 AS SEQ_01. RENAME SEQ_03 AS SEQ_02
"I am annoyed"
I recommend that a duplicated sequence is automatically opened in the Timeline window and made the new active sequence.