I can't speak for the other reviewers of your suggested edits, but...
Possibly, at first glance at your links, I would avoid just changing the title into a question (from an already grammatically correct statement) on an old established question - as this adds little to the post and just bumps the question (again).
From your examples: #1, #2, #4 and #5 just seem to change a couple of words, but with little (or no) added value - apart from making a grammatical question, which isn't really strictly necessary. Many sites use title statements rather than questions - to be honest, either seem acceptable, so just changing titles (of old questions) into grammatically correct interrogations seems unnecessary. You could do that for the new posts, as they aren't yet established - but if you are trying to look up an older question and the title has been changed, then that could be taken as "making the post more confusing".
Also, there are a lot of question titles that aren't questions (but statements instead), and converting them all would mean a lot of suggested edit reviews - all for little to no gain.
Focusing on #5 for a moment, adding the "Longer LK5 Pro" to the title is redundant as the question is already tagged with longer-lk5. Generally, when a question is tagged with "something", that "something" is then removed from the title due to redundancy (see the section Avoid putting tags in the question title under this answer to How do I make a good edit?).
That said, your example #3 does seem useful as it does (admittedly) describe the issue better. That was one that I rejected, purely because (IIRC) it is an old question that already has an answer (that probably should have been accepted, had the user returned to the site after posting the question).
Actually, sticking with #3, the "with TMC2208 and Klipper" in the title should be removed as it is redundant, due to the tags (going by what was said above), which (by those rules) would leave the title as just:
Creality Sprite Extruder custom install on Ender 3 Pro
which really is utterly meaningless! LOL. :-) So, maybe the part of your suggested edit that includes the voltage is a very good idea - even though the answer then states that the voltages should be ignored - so something like this:
How to configure the TMC2208 Driver Voltage for a Creality Sprite Extruder custom install
and maybe tag with ender-3-pro, if there is one, otherwise the existing ender-3 tag might suffice..? However, I'm not sure how the Ender printers are meant to be tagged, and I might be wrong. There was a Meta post/discussion somewhere by Trish and/or 0scar about a possible hierarchy of tags, i.e. something like creality andender and then 3, which I think was rejected - however, I've had a good look and really can't find the meta post.
So, in summary, I would reject all of those edits again, apart from #3 as the title is a bit of a mess anyway - remove the redundant already tagged info from the title and mention the stepper driver voltages. If you suggest that edit, I'll accept it :-)
Suggestions
As this is a small site (with little traffic, as discussed in your previous meta post), most of the questions have been edited to death already and as such, it can be difficult to find things to fix. It is probably best to stick to new posts that haven't yet been edited, or if an older post is blatantly incorrect and has been missed then that should be fixed.
You might find this useful: Useful things to check for when cleaning up posts
I notice that you've added some tags in other suggested edits. Many of these tags have no description, which can make it a bit harder to review the suggested edit, w.r.t the validity of the tag. If you could edit such "empty" tags, with descriptions and usage, that would be really useful. In which case, these are related:
The problem with mods doing reviews
As there really are so few regular users on the site, the review queues often fall to the moderators - otherwise they would never be cleared.
One issue with mods undertaking reviews, is that we are unable to vote as normal users, see Add a way for moderators to cast a normal, non binding close/open vote. That means that only one vote of ours is needed, which seems very undemocratic. I'm not happy about this, and would much prefer to have a community of votes, as is the usual case.
Unfortunately, we don't have that luxury, and so some votes may seem autocratic in nature. However, as you have done, bringing up any perceived slight is always a good idea, and raising them here in Meta is always good for a discussion.
