I am not an engineer either, but I think that job is totally subpar. The conduit needs to terminate in a junction box that is at least 8" above the water line, at least 4 inches above ground level and at least 4ft away from the pool edge. That can easily be accomplished by them gluing new conduits and running it back to a junction box.
From NEC 680.24
(a) Vertical Spacing. The junction box shall not be located less than 4 in. above the ground or pool, outdoor spa, or hot tub deck, or not less than 8 in. above the maximum water level.
(b) Horizontal Spacing. The junction box shall be located not less than 4 ft from the inside wall of the pool, outdoor spa or hot tub, unless separated by a solid fence, wall, or other permanent barrier.
As far as the concrete - I wouldn't trust that one bit. When they are done (and have your money), it may look fine. But I would not be surprise at all if in a year or two - you have a major problem with the dirt settling and crack forming. I agree with Dan that they should cut out the section of concrete and then repour it. However - trying to match your current concrete is going to be difficult. Maybe a better solution would be cut out that section of concrete and repour. However - don't even try to make it match. Make it different so that it looks like you intentionally wanted it to look different, and that it's not a patch job.
(BTW - I am trying to deal with my PB on a concrete issue and I want them to cut out a small section, reset my grabbar which are not even, and then put a pebble finish so it looks like it was meant to look that way. There is no way they can match the concrete finish that is already there, and I don't want it to look like a patch job.)