I agree that giving up power cleans would be shitty. You should try to keep them in there somewhere.
Squatting heavy twice a week at the poundages you're working with, maybe deadlifting every week isn't going to work recovery-wise any longer, until you shift to intermediate programming. Advanced Novice has deadlift every other week for this reason. Your current setup is kind of bridging the gap between Advanced Novice and TM by having deadlift on Monday and keeping it in there every week.
1. If you like your original program, you could alternate deads and power snatches on Monday, and keep power cleans on Friday. Don't add anything else on Wednesday in place of the snatches, let it be more of a recovery day. This is the smallest change from what you have and might be enough extra recovery to run this a while longer.
2. Try programming your pulls like Advanced Novice, with deads/power cleans alternating on Wednesday, chins Monday/Friday. When your Friday squats start suffering from Wednesday deadlift with this setup, probably time to shift to TM.
With either of these setups you'll have to experiment with your deadlift increment to see what works. Since you're milking your squat progress your deadlift may not keep pace, but once you switch to intermediate it will accelerate.