You are still in violation. The way the DLI change work, does not require human intervention, you can even go and do it now and it will give you same confirmation. Issue will be when your old DLI filed yearly regulatory report to IRCC or when you will be applying for pgwp...I prepared all papers and the LOA of the old university to which I applied for the visa. But the officer at the airport did not ask me about any documents, he just asked me about the name of the program and the university.