1.) On PC with the Thrustmaster T300, T3PA Pedals and F1 Ferrar Addon, it's again almost impossible to map the brake to the clutch pedal. I use this way of braking since F1 2013 and I'm not the only one, whereas I have you also told you about the issues on F1 2015, where it worked only with inverted pedals (pressing F2 ingame on control settings menu). Well now it's not about reverting, because that isn't necessary anymore, but when assigning the brake to the clutch pedal, it's recognized like a normal button, not an axis, which means that you theoretically brake like on a keyboard or controller button (not L2/R2). Could this please be fixed? On PS4 I have absolute no problem regarding this.
2.) When comparing the PS4 with PC version, running the same wheel, settings and setup, I must say that on PC you have absolutely no effects/vibration on straights. Let's take for example Baku - start/finish straight with DRS. Here on PS4 the wheel slightly vibrates due to the road and their signs on the streets, but on PC nothing like this happens. I've mentioned the wheel above and as for ingame FFB settings, I've used 90/15/90, but it's not about that, as on PS4 with the same settings it's totally different. Just hook up this wheel with regular settings on both platforms and see the complete differences.
3.) The same also applies to the wheel weight. On PC through corners the wheel weight still stays there, meaning it puts up resistance, but on PS4 you simple loose all the weight and the wheel feels loose. Even if crank up everything to 100/100/100 it's the same issue.
If screenshots, videos or anything else is needed, please let me know, because I can't know what information is important for your team.