How much space is there in front of the sink?

If you move the sinks back an inch I think they would be too far from the front of the counter to be easy to use, think about leaning forward to brush your teeth or wash your face. And as nnigrt said, you may have interference with the controls and the top of the vessel sink. If it is draining appropriately and not splashing from possibly hitting the back slope of the sink, it will probably be fine, just something for you to get used to.

I agree the taps are the problem they needed a straighter spout

I'm not seeing a problem. You certainly don't want those bowls back any further.

you'll be fine. or you'll learn to be fine. or you'll hunt down longer spouts.

You're going to get a lot of water splashing behind the sink but at least it will be easier to reach. Vessel sinks are a challenge.

I only recommend vessel sinks for powder rooms, because of these type issues. Sorry, it is small consolation but it isn't as bad as it could be.

Here's one of ours. The bowl overhangs the top which is a big plus for a splasher like me:

Here's mine. I got it in black finish.

http://www.calfaucets.com/product/single-handle-vessel-lavatory-wall-faucet-trim-only-to-v6202-9

I must say though, the company was of no help to me when trying to determine how far out of the wall it should be placed. They said it all depends on the placement of the sink, which in the end, is true. It's the danger of being our own designers. For me, it worked out - this faucet comes about 10" out of the wall.

Were I in the bath business exclusively, I would make a video of the customers standing at and approving a full scale mock up of their wall faucet selections before anyone even thought of picking up a tool.

You can't tell from the picture, but my handle damn near touches my bowl when it's pulled out. Just pure dumb luck it didn't hit, or I'd have had plumbing to re-rough in and tile to replace.

I was told that the water coming out of the wall mount faucet should hit the drain in the middle of the vessel sink to avoid splashing. We are using Kohler Purist wall mount faucet with Kohler Vox rectangle vessel sink. I made sure the granite fabricator had the faucet and sink together when cutting the granite counter top and that he also looked at where the faucet was going to be mounted on the wall. He installed it today and the water stream will line up perfectly with the drain on the sink although to me the sink looks a little far back on the counter but I guess that's needed with vessel sinks. There's about 4" of counter in front of the sink. I think it will work wonderfully and looks great, I'm just being picky, but in hindsight I might have designed a narrower vanity cabinet and top.