Norecs

Hi! I'm struggling with a really intermittent misfiring issue and thought you guys might have some advice. Vehicle is a 2013 Octavia 1.4TSI 7DSG with 177 000km. 6 months ago, when backing up to my parking spot and setting to park, the check engine light started flashing and the engine started vibrating. After shutting it down and starting up again, the light was off and everything seemed to be fine. Some weeks later i had VCDS hooked up and it reported cylinder 3 and 2 intermittent misfire (P0303 and P0302) with a timestamp pointing at the time i had the problem. Cleared the codes. Up until yesterday, everything had been fine, until again, i backed up to a parking spot (not sure if coincidence?), stopped, and the CEL started flashing. Restarting the car "fixed" the problem but VCDS reports cylinder 1 and 4 intermittent misfire P0301 and P0304 (note that 6 months ago it was 2 and 3) at the time CEL was flashing. Both times the issue occurred - the car had reached operating temperature, AC running. As i think of it, ever since i bought the car 8 months ago, the idle has felt a little rough once the engine has warmed up but i'm not sure if i'm imagining it or not. Could it be that there's minor misfirings happening all the time and it only becomes apparent when idling? I've never felt any hesitation or issues when accelerating or while the vehicle is moving at any speed though. In-between the 2 misfiring occasions, all the spark plugs have been replaced along with the air filter at a reputable place (not sure if they switched coil positions while doing it or not). I have done some googling and im guessing I should swap around the coil packs to see if the misfire reports at different cylinders but doing so, I may need to wait several months if not more, for the results and I can't really trust the car anymore on long trips... Is there anything else that I can do/check in the driveway without any special tools, without taking the car to a repair shop? Any ideas? Or order and replace all 4 coils just to be sure? Costly if it's not the coils causing the problem though.