Hello there, I thought I'd add my own perspective on this. While this is indeed a standard Isekai manga and it borrows plenty of the gimmicks, and character traits of different works, it does have this mysterious charm that is carried primarily by the main cast. Although an older gentleman, Fujimura, a veteran steel craftsman takes full advantage of his newly-found youth to craft his own weapons and makes use of the magic system to make some powerful explosive stuff. He is quite the optimistic fellow who sees the potential in anybody, acting pretty much like the caring dad of his party of misfits, despite being a teenin his new body.
Frau an armless adventurer down on her luck, although a typical downtrodden maiden at first, slowly grows into someone the people around her admire. So she gets a decent character arc.
Then there's Eltiko, the elf rejected by magic itself who needs to overcome her enemies and her curse.
While at the end of each arc Fujimura does face a boss battle and wins with wits and strong skills, what I love about this manga is that he places a lot of faith in his initially misfortunate friends and encourages their growth. So I can't help but like characters who start from the bottom and someone helps them rise to the occasion.
While the art and world-building is average, it does make up by having the cast put a smile on your face.
Overall, it's a good mood-booster manga!