It's possible to work around the restriction easily. This tool (https://github.com/p12tic/eagle-brd-merge https://github.com/p12tic/eagle-brd-merge) can move a

It's possible to work around the restriction easily. This tool (https://github.com/p12tic/eagle-brd-merge https://github.com/p12tic/eagle-brd-merge) can move a single Eagle board around, so whenever you want to move a component outside the allowed window you simply move the board. You can panelize the boards without any board size restriction using that tool too.