Company of Heroes: Definitive Edition announced for PC

I noticed the announcement includes a new campaign mode, which seems like a significant expansion for fans. However, I wonder if the historical accuracy of the game will be compromised in the name of adding new content. What measures will the developers take to ensure the integrity of the original experience?

I'm curious how the enhanced visuals and features in Definitive Edition will translate to gameplay performance on PC. With the original game requiring a lot of power, I'm wondering if the extra details and graphics will make the game unplayable on lower-end systems.

I'm curious about the level of additional content included in the Definitive Edition. Will it offer new missions or just polish existing ones?