First a couple of disclaimers: 1. I am a 1.6 owner. 2. I spent more money on my car this year than it is likely worth (new head, intake, exhaust manifold, complete exhaust, Mazda comp diff, replaced almost all suspension components, setups from very knowledgeable SM shop, dyno time, AFM tuning, etc). 3. This year was my first year racing.
With that out of the way here are my thoughts: The 1.6 needs some help - as many here agree. Even when I was doing track days last year I immediately noticed that the car goes slower the longer you run it. After looking at the data I saw one obvious answer - the intake air temperature. Further data collection, analysis and testing with and with out the left turn indicator lamp proved this. I validated the data several times at 4 different tracks with the same result. Hence my presentation of the data and letter to the CRB earlier this year. This is what I believe to be the biggest issue with the 1.6. I did not test the wrapped intake with this change, however I would guess the two would work nicely together and support that change too.
This year I did make many improvements to my car, however I would not claim it to be top prep - it is not. I am not asking for and do not think the car needs a lot of help. With the changes requested I do not expect it to become a winning car - it won't. Additional changes (header and compression) coupled with the removal of the turn indicator and wrapped intake could make it a top car. However I do not think that would be good for anyone to make this car the best car. Something must be done to help the car a little and make it more consistent - when you can drive with a 99 at the start and then a few laps later you are doing all you can to told on in the draft and then at the end of a race you don't have a chance something should be done.
Specifically talking about the compression change - if it were legal I would take advantage of it (even though the days of me driving a 1.6 are numbered and I think compression is the wrong answer). From what I have seen the intake air temp is the problem. The solution is free. We need to start with that and the wrapped intake - then go from there. Allowing us to clean up welds on an exhaust manifold would be nice - so we did not have to look at and try several to find a good one (that is not cracked).