ok, pleasantries are over, time to get nasty
(because I know you appreciate it really)
I hope the fix on the Desktop machine in your den (woman cave?) works because the black and white points on many of these are all over the place
with blown whites and crushed blacks in all bar the B&W one. That laptop is doing your editing no favours
What I learnt with my UWA is the importance of keeping the camera as level as possible during capture, using a hot shoe level to aid this and if necessary, shooting at a wider angle than the composition requires, then cropping any boring foreground off in PP (to avoid tilting camera up). Note though, that it is also important to keep the camera left/right level too, to avoid issues requiring a rotation in PP, which complicates any remaining perspective corrections necessary.
Talking of PP 'perspective' corrections, I find a good method is to:
First Ensure lens profile corrections are on, dealing with any barrel distortion, etc.
Second Ensure Chromatic Aberration correction is on to deal with CA, adjust amount and colours if necessary
Third Check and correct the left/right leveling, by choosing a vertical edge that
will be in the centre of frame
after cropping (although you should do this
before cropping), overlay the grid to assist
Fourth Use whatever means works for you* to correct any converging verticals to an extent that makes the image seem natural, this won't always mean a 'complete' correction, especially if the shot is unavoidably looking up, sometimes better to leave a little, use grid overlay to assist
Fifth Crop to the final composition
Sixth Recheck perspective, if not acceptable, undo crop and revisit the necessary adjustment to fix and continue from that step in process to the end again.
* I haven't done enough lately to advise accurately which way is best - in the past, sometimes I apply a correction and it just works, others times; it fixes the verticals, but leaves the structure lacking its full height (squashing any round windows), so then the height needs stretching to compensate, a recent example here is in Neville thread:
Converging verticals - To see, or not to see - clearly I'm doing something wrong/different when the latter happens. I must get out and shoot/PP more myself, although my capture technique largely avoids the need for correction whenever possible.
The main thing, to avoid driving yourself nuts, is to do things in a sensible order, here's why I say that:
If there is uncorrected rotation in the shot, you'll perhaps balance the converging verticals on left and right edges of the frame, but, especially after you've cropped, it will still look wrong.
If there is uncorrected barrel distortion and you're checking verticals that only exist adjacent to frame edge in the top or bottom half of picture, that doesn't help.