Three things before I say: "Welcome to the forum":

1) What does that sentence mean? You are asking for advice on diagnosing a car here, you have got to be clear and specific.

2) Did you buy a new RCM and New Crank Sensor? If so and the issue still happens, my first question: Exactly what CPS did you buy? MANY have fought hard, long battles because they bought a cheap knock-off of a Crank Sensor. If you did not buy a BOSCH from FCPEuro, German Auto Supply or AutohausAZ, then you are wasting your time and ours. Get the RIGHT part and see where things go.

3) Now, the spongy throttle, in my mind, clears the RCM and Crank sensor. The fact it clears on a restart, and how it comes and goes, makes me ask: "What is your fuel pressure when the car is acting up?" Low fuel pressure does WEIRD stuff:

• Sometimes starts easy, sometimes hard.
• Sometimes runs fine, sometimes can only idle but cant handle the accelerator being pushed.
• Sometimes can barely idle

... it all depends on how low the fuel pressure is. You've got to have 55-62psi at the rail. This simple to use test kit saved me twice, once with the Crossfire, once with the Ford Ranger:
OTC Tools 5630 OTC Fuel Pressure Testers | Summit Racing
Get one, $50 or less with shipping and you can test for fuel pressure as easily as you can check for a low tire. Takes all the guesswork out of "I wonder if I have fuel pressure?"

A final note:
Our cars are aging, if you have the OEM pump, you are on borrowed time. You cannot assume the pump is OK and I do not care if you can hear it run or not. IF you are going to try to fix this yourself, quit wasting time throwing parts at the car and see if you have fuel.

To get the car to run, you need:
Fuel
Air
Spark
Compression

You know you have compression and air, do you have spark and fuel? The crank and cam sensors are part of "Do I have spark"? The RCM and fuel pump/filter/regulator are part of "Do I have fuel pressure?" Measuring fuel pressure is way easier (for me anyway) than figuring out if I have spark.

Wait......... you have too little air if the throttle body's butterfly is not working right. This can be a bad TB. But the way you describe how it's acting, I"m leaning away from the TB. So far, that is.
Let's find out what the fuel pressure is. If it's 55-60psi, we can move on to other stuff. But on Facebook, we've seen reports of more and more fuel pumps dying. And they die slowly, like what you are describing. Good news is, they are easy to figure out, with the kit I showed you. Best $35 I've spent in the garage in a LONG time.