"Next week we are going to change the default php version from php5.6 to 7.1 . This will increase the security and performance for your websites. If you need to use older php version - you will be able to change it via cpanel - MultiPHP Manager. We will also change the php handler to php-fpm which will increase the speed for the websites. Do no hesitate to contact us if you have any questions."
Suppose as I have "PHP5 - PHP7" choosen in almost all my published websites I don't have to do anything

Shall check my oldest sites to... but are there any issue to this?