i do.... they had a turbo 2 at the detroit auto show with a speed3 motor in it. but let me pick at what you said a little.
why are 4 wheel disc brakes a ridiculous thought? the protege had 4 wheel disc and was offered for 16k... the 2.5L motor would not have to be developedd as it is pre existing. all that would be needed would be mounts right? bluetooth can be added for cheap but never would because mazdaspeed only adds upgrades for performance not luxury. 16 inch wheels were also on the proteges for 16k.... forced induction is not all that expensive. just look at the price of the msp when it was released. this is all very possible.
I'll reply as someone who's actually purchased a 2 and is aware of their cost.
I purchased my nearly fully loaded 2 (everything minus AT and auto-dimming mirror) at the "dealer invoice price of $15.5k". By the time everything was done I paid $17.5k out the door. FWIW, I never said they were "ridiculous thoughts" but the idea of adding all those for under $2.5k is indeed ridiculous. So onto my counter points:
1. I don't believe the 2 shares its chassis with anything other than the Fiesta, which also does not have rear disc brakes, which means the whole setup has to be developed. While not overly expensive in its own right (maybe $500 on the low end) given the size and weight of the car most would argue why the 2 needs rear disc brakes. The answer is likely for the given size and weight of the car rear drums perform just as well as discs while being a fraction of the cost. Either way, by itself it's not a major cost-adder.
2. The 2.5L motor does not need to be developed, correct, but do we know it fits? Assuming it does, yes, new engine mounts are needed but that's only the beginning. The ECU would have to be relocated to the cabin (current it's in the engine bay), which is an extensive modification to the existing wire harness. The ECU would have to be retuned to account for the 2's smaller size and weight (likely detuned). The suspension would likely have to be modified to account for the significant weight increase from going from a 1.5L engine to a 2.5L engine. This alone I see requiring more than $2.5k. Combine a $20k total price with fuel economy and power ratings equal to a similarly priced 3, which do you think the average consumer will purchase?
3. Bluetooth itself is cheap, correct. Adding a bluetooth system (I assume we're talking about something like Ford's SYNC system) to a car, which currently has no provision for one, is not. This again goes back to requiring a unique wiring harness, or at least modifying the existence of the current one to allow for a modular addition of said bluetooth system. Also, don't forget adding new steering wheel controls and/or headunit controls for which there also is no current provision. All-in-all this is probably a $500-$1k adder. Again, not that signficant in its own right but this stuff adds up.
4. You keep comparing the 2 to a Protege when they are very different cars. Although the 3 has gotten larger, the 2 is still a much smaller car than the Protege in both size and weight. Sure you could fit 16 inch wheels on a 2 but for a moment think about how car manufacturers deal with wheel options. First of all, larger wheels usually come at a premium price (+$1k or more). Second of all, look at Mazda's history with wheels - they're boat anchors. The last thing needed on the 2 is more weight.
5. This one really got me. Forced induction not all that expensive? What was the price difference between a fully loaded Protege ES and a MSP? I bet it was more than $2.5k. While this is in all aspects better than a 2.5L option (lighter, more fuel efficient, etc.) there is still a tremendous amount of engineering work involved. New hardware and a new ECU tune are required at minimum.
I would love to see a MS2, don't get me wrong. The problem I see is the total price to the consumer is going to be over $20k with all these options. When I went looking at the 2 I went in looking for a small, cheap, fuel efficient car and a MS2 does not fit that bill.