Thank you for sharing your valuable feedback.
The 2MB limitation is because of an issue in png prediction re-sizing algorithm which in some cases can cause that the smaller (down-scaled) images to take up more space than the original after getting resized. In such case the project assets can become larger than 50MB, therefore after research we decided that regular optimized splash screen will not exceed the 2MB limit.
We are going to verify the research again and consider increasing the limit to a more reasonable number.
Also, we are working to optimize our compression algorithms.