I think it makes you appreciate them more as you spend less time with them, but perhaps you make that time 'count' more. Of course nobody sets out to have DCs with the intention of being apart from them for any amount of time, but when the situation arises there are certainly benefits.
I have my DCs 5-6 days a week. Dp has his 3-4 days. He definitely misses them by day 3 or 4 without them, but is very doting and attentive when they're with him, wants to take them out and treat them etc, they stay up late so that he can spend extra time with them. He would dearly love to have them with him all the time, but certainly for me, I relish my days off and really appreciate the situation I have. Perhaps 2 days off is ideal in my mind?
I feel like 50/50 can difficult to strike a balance between the 'fun time non-resident parent' who gets to do the fun stuff without the daily grind, and the regular drudge parent who has to enforce rules and make themselves unpopular in the DCs best interests. With 50/ 50 both parents are more equal and both homes equally important to the DCs.
For mine, all their stuff is at my house, they have to transport it back and forth each week for one/two nights and their dad generally doesn't have to worry about homework, organising play dates, parties etc. he doesn't have to chase them to tidy up every day or help with the housework as they don't have much stuff there to tidy away.
Sounds mean, but I really look forward to my nights without them. It was really heartbreaking to start with, but I soon realised that the chance of a night out was not to be sniffed at! If it's two nights I start to miss them and I imagine by 3 nights I'd be looking forward to having them home.
I think that's why dp struggles a bit on his alternate week when they are at their mum's for 4 nights, but if you knew they were happy and well cared for on those 4 nights or if you were able to break it up into 3 on 3 off with rotating days, then I imagine it could be a great set up, with best of both worlds.