When was the last time that a youngster ever come back and play for the first team after an abroad loan?Chelsea sent a lot of youngsters to Vitesse who's about PSV's level and most if not all of them after that still had to get another further loan in the Championship.There's a big difference between English football and the rest of the world in terms of style,tempo and physicality and we're playing most of our football against England opponents so if we want to prepare the lads for first team football, it's the best to send him to English clubs.
That saying I don't think LVG will loan him out.
Vitesse isn't at PSV their level. PSV actually has money and can buy good players, they're winning the league by 11 points and play CL next season. Vitesse is struggling to keep within FFP and gets loads of Chelsea youngsters every year, even for positions they don't need them. They play nice football but aren't a topclub like Ajax or PSV. They're currently 5th and 26 points behind PSV.
Atsu has done well at Vitesse and he's now playing for Everton. Not every young player has the talent to grow into something big, but the Eredivisie is a great place for youngsters. It isn't a physical league but tactically it's fine and they can give more playtime to youngsters than any team in the PL would (for unproven talents). That's basically what our league has become: a training ground for talent who we need to sell to earn money.
On the topic of him being loaned out to PSV, their current midfield:
They play with 2 attacking midfielders and 1 CDM, in order from most important:
AM: captain Wijnaldum, Maher, Guardado, Hiljemark, Ritzmaier
CDM: Guardado, Hendrix, Schaars, Hiljemark
Wijnaldum will probably leave and Guardado is on loan from Valencia (but willing to stay). Ritzmaier will definately leave.
PSV need to strenghten there next summer if said players leave, but I'm not sure if they are interested in a loan. They do already have youngsters Rekik from Manchester City and Isimat-Mirin from AS Monaco on loan this season though so they might.
It won't be a guaranteed starting place for him, but he'll have more of a chance than in the PL and maybe he'll even get the chance to play CL/EL. I think it would be a good temporary move for him to get some playtime if he extends his contract.