Not they do not arrive faster since the need the same time to build as grenadier any difference come only after 2-3 unit.
They are cheaper to reinforce but they have bigger target size and thus suffer more loss while they need cover to have some DPS.
And that is why I described them as grenadier ver.2
I am not sure what you arguing about unless you agree "that you play Ostruppen and Grens completely differently due to their toolsets."
Ostruppen have always had the bigger target size and cover requirement and yet were used to good effect before so there really isn't a need to consider that. If you can build 2-3 ostruppen faster than 2-3 Grenadiers because they are cheaper then that is still an advantage is all I'm saying. Their faster/cheaper reinforce time also lets you get back on the field faster too which is also still an advantage. They have always been "grenadier ver. 2" . You're saying that like it's a bad thing or something new but Call-In Grenadier Ver. 2 and Buildable grenadier Ver. 2. is still grenadier ver. 2. no matter how you slice it.