It's very tedious to export one by one when you have tens to hundreds of log files and you want to export all of them. A mass export option would be helpful.
Question: How do you have hundreds of different log files within the same project? Each test execution of a project creates one log file... so, at the end of the project, when it completes, you export that log file. Each time you run the project, you export the current log file.
If you have hundreds of projects in a project suite and want to execute the log for each one... again, the export happens within the project, not at the suite level (suites don't actually execute code, they just contain projects). So, if you run your project suite, each project that runs will export the desired log.
Guess I'm trying to understand what problem is attempting to be solved.