Arcia's been a problem at the plate for a large portion of his MLB career. His K rate is like 2.5% lower than Braun's too this year and he's 11yrs younger. It sounds like you think Braun and Arcia are comparable hitters, which they most certainly are not. Arcia hasn't matured over his time. He's like Perez; they go about their business and never take that next step. He's a slightly better version of Alcides Escobar but with more power, less speed. He absolutely has been a hole in this lineup most of the time offering no consistency. Low BA, low OBP but his power came back (which was obviously going to happen as well). Dubon is a high BA, high contact/low K bat who brings consistency to any lineup. He's been that way his entire career. Arcia had what used to be called a sophomore slump for most of 2018. Other than the 5 months of 2018, he's been a productive major league hitter. His career K rate is actually below major league average. His BABIP rate would indicate he's hit in bad luck particularly this year. His OPS is 125 points higher with BABIP rate down 40 points? That's not easy to do. His walk rate could be better, but as the 8th hitter, I'd rather he be swinging with 2 outs and runners on. When he bats 9th, he gets better pitches to hit and he's slugging .487 in that spot compared to .410 with the pitcher batting behind him. Let's see what Dubon does against major league pitching. Most guys K rates go up pretty significantly with the jump to the majors. I think he's ready to be a decent major league hitter, but I don't expect much more than something like .270/.320/.400. Useful sure. A future star? Doubtful.