Any thoughts on these possibilities, or any others you can think of ?
To take your points in turn:
Its a game, take the good with the bad and respect the umpire.
Of course you should but that doesn't tell us actually anything about whether we should have review system or not.
Plus players are more likely to show disrespect to umpires when they are making wrong decisions that screw a team over.
And most importantly of all, umpires are of secondary importance to the game itself. They are there simply to make decisions as accurately as possible. The UDRS helps them do that.
The current sytem is simply a ploy for TV to add drama for people who aren't interested in cricket
Well, the reason it's been adopted and retained is to improve decision-making, which it does. If it also adds to the drama for TV viewers (and spectators at the ground who see the whole thing on big screens), I don't see why that's a bad thing.
If it is going to be used, it should be used every single time. To limit its use is a travesty, simply ridiculous.
Not necessarily. It stops the reviews taking over and becoming tiresome. The same system is of course used in tennis so it's not as though it's been plucked out of thin air.
It gives perference to some batsmen over others i fteh referrals have been used by earlier batsmen. It will influence players averages depending on their position in the batting order.
I don't think this is a major thing.
Batsmen's averages have always been determined by where they bat in the order. Openers have to face the new ball and fresh fast bowlers, but also usually get time to build an innings. Lower/middle order batsmen are maybe more likely to be asked to sacrifice their wickets hitting out for quick runs. And tailenders have always got rough decisions from umpires.
Will the batsman getting reprieved lead to higher scoring games and possibly more draws ?
No. I don't know what the stats are, but I'd think the wrong "not outs" and "outs" reversed under UDRS are pretty similar in number.
Besides, if what we need to avoid draws is a whole load of uncorrected umpiring errors, I'd take the draw every time. Look at other areas of the game to try to ensure results. You could start with the pitches.
Will umpires give more not out decisions because they won't want to be shown up as being wrong ?
They'll be shown up as being wrong whether they give batsmen "out" wrongly, or give batsmen "not out" wrongly. In fact those errors are already shown up. It's just that those errors can now be corrected.
What's more likely to happen is that umpires will tend to get decisions right more often, a process which began when they started using Hawkeye but before the UDRS came in. Hawkeye has shown us that a lot of the assumptions which we and umpires used to make about what's out and what's not out were simply wrong.
What will happen when an umpire is shown to be regularly wrong on lineball decisions ?
In the short term, his regular errors will be corrected. And in the long term he'll have to improve, or get the sack. These are good things, surely?