Yeah obviously the reserves should be just as strong, or almost as strong as the regulars. If someone gets injured or red flagged off the pitch in a match, and the only options are weak reserves, it'll throw the whole game. Not to mention they should be strong to replace the third years when they graduate. Also, they provide scrimmages with each other. Both regulars and reserves should be at least almost equally as strong as each other. Otherwise there's no point and the reserves may as well be super good team B players