It seems everyone is confused here. Zend Optimizer+ is purely an opcode cache. It does not support the same features APC did that this plugin took advantage of. Once you move on to PHP 5.5 Zend Optimizer+ will work out of the box without any troubles. The only support this plugin needs is to make the clear opcache button work which would be executing accelerator_reset(). The userdata cache in APC will be gone though. This is supposed to be a drop in replacement for usercache, https://github.com/krakjoe/apcu#readme, but I don't think it's considered stable yet.
So in short he just needs to make the button work with it and we'll have essentially full support. It will be up to the users if they want to grab APCu to continue using those features or switch over to an alternative opcache with usercache support, disk caching, or memcached (redis support would be neat though).
