On Tom's jobs, either Tom or one of his associates is approving the features i.e., greens, bunkers, tees, big fwy shaping, etc. So you at least get another set of eyes on everything. Depending on how staffed up the job is, sometimes that's all the collaboration you'll get, or sometimes you're working on the same hole or green complex with someone else and you're chatting every couple hours about how it's coming together.
A lot just depends on the type and flow of a project. On a new job you'll see everyone once a day at lunch, but I could go a few days without anyone seeing what I'm working on depending what I'm doing, where everyone is on the property, if you're sharing a vehicle or if everyone is driving themselves, or if you're in little buggies and convening at the shop.
But getting and giving feedback is similar to an art critique. The type of information to give and the questions to ask are the key. If I'm the one shaping and someone comes over to have a look or I ask their opinion, I'll give them a general overview of what I see as being important to that particular feature, the problems I've encountered, how I chose to solve them, and what other ideas I tried but already scrapped. Then at least everyone in the conversation is on the same wavelength and able to objectively discuss new ideas. Similarly, if someone calls me over to look at something, I want them to give me some baseline info so I'm not suggesting something they already tried.
At that point everyone is objectively discussing ideas, problems, and solutions, and that's really fun. Everyone understands what needs to be built, but everyone has a different method of solving the problem. Then you start to get funky ideas and meld differing aesthetics, and maybe you're trying a bit of one idea and mixing it with another, building and riffing off one another. The 5th hole at Washington Golf turned out this way. I think everyone who worked on that job (at least 4 people) spent time shaping the green and shaped some of the bunkers. It was constantly being improved and edited up until the sod pallets were coming out to be laid. Turned out really well because of that collaboration.
The key is to never take a critique personally. Some shapers look at their work as an extension of themselves, and it's hard to break through and have that collaborative culture when that's the case. There's a tendency to disregard a different idea or solution if you take things personally. We all get attached to certain things, but the best results come when everyone has an open mind.