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So I’ve read the sample chapter and that’s a definitive “no” from me. Maybe this is a lost-in-translation case and it’s better in Japanese but in English the MC is just terrible. I get it that they’ve aimed for “quirky” and “endearing” but it comes across as “obnoxious”, “gross” and “off-putting”. Here are some quotes from MC just from the prologue:
“This is so easy. It’s about as easy as day-old bathwater is on your skin.”
My dream is to become a houseplant in an apartment shared by a cute lesbian couple and have them water me and feed me romantic scenes every day.
“N-no, no… I’d be putting my life in danger if I kept playing any longer… I need yuri to cleanse my mind…or I won’t be human anymore…”
My yuri sense began to tingle.
“…Ah, I haven’t even been able to read this month’s Princess Yuri yet.”
“So the yuri pairing is safe, huh? Then I guess this is fine…”
“Absolutely not! I’ll protect those yuri couples even at the cost of my life!”
The order of priority went like this: yuri >>>>>me>>others.
“Nothing gets by me when it comes to yuri girls.”
“Oh, I have a yuri IQ of 180.”
“Never in my life have I insulted a yuri girl with a joke. As a dutiful Japanese citizen, I have never once failed to pay my taxes or protect the sanctity of yuri.”
“Well you took away my precious oral moisture. Give it back.” I pointed to the puddle of water at her feet with a grin, and she walked away. (<<<- This part is one I don’t understand since the girl he’s talking to didn’t do anything to cause the puddle. My interpretation is that he wants to drink from the puddle because she stood in it)
There is a lot more of that. And that’s only the prologue.
With all your examples back to back, I think I can pinpoint now why the Reincarnated as a Sword illustrations fell so flat for me. It’s the lack of expressions. You have an inanimate object and an expressionless girl, so it’s to be expected, but the only illustration I liked from the ones you posted was the last one at the table while eating. and on the flip side it’s probably why I cherish the Bookworm ones so much because there is always such a high emphasis on the character’s expressions.
I have always found the Solo Leveling covers to be strange for a series based on source material, where the visuals play the most important role.