Plenty of touring bikes use Deore bits too, as most iterations have been decent, reliable and value for money and offer some different cassette ratios. If I were you/him, I'd ride it and replace bits as he breaks them, they wear out or he realises they don't suit what he wants.
Obviously, it's all personal taste. And I quite like the slightly franken-nature of mixed up groups anyway (see the functional and frankenbike threads also for some ideas). So matchy-matchy isn't really a thing for me. But it's his. Do what it takes to get your mate riding it and then enjoy it!
Plenty of touring bikes use Deore bits too, as most iterations have been decent, reliable and value for money and offer some different cassette ratios. If I were you/him, I'd ride it and replace bits as he breaks them, they wear out or he realises they don't suit what he wants.
Obviously, it's all personal taste. And I quite like the slightly franken-nature of mixed up groups anyway (see the functional and frankenbike threads also for some ideas). So matchy-matchy isn't really a thing for me. But it's his. Do what it takes to get your mate riding it and then enjoy it!