LarP_LEGO I have previously submitted a support ticket on this topic and this was my reply from PF.
"Thank you for contacting the TrainStation 2 Support
I am very sorry to hear that you feel this way about the recent changes. I understand your view.
Please note that the icons are smaller and serve as a preparation for the next change that will be implemented soon. Please note that this was a necessary change but we are still collecting all feedback.
I have forwarded yours to our Game Designers so they can consider to enlarge these icons but I cannot promise any change at the moment as it needs to be re-viewed by our team first."
At least we can click on each of the tiny icons to go to the relevant item in a readable size.