I wonder if SK is obliquely referring to an impending Junction of Time (DH calls this "temporal junction points"). Particularly in light of the other end of that sentence (stay alert), it seems like SK is clued into danger nearby or in due time. Easy guess is Griffith/Boy's arrival, but maybe it's not so incidental as that. Too bad they were interrupted by Ged.
That would be the logical assumption, although I guess it depends on what constitutes a junction of times (in terms of scale and impact) as opposed to a "simple" convergence of causality to influence an outcome. Either way, I think the meaning is clear: don't relax, something's coming. I do still love the fact that Gedflynn interrupted them though, despite the frustration. It's difficult to phrase it properly but I find it cool that they're among allies who are pulling their weight for a change. Be it Ged, Volvaba or Danan, these aren't people to be taken lightly. It's a welcome change, especially when I think back to the years Guts spent fighting alone. He's had companions for a while of course, but here they basically have their forefathers in front of them, people who can provide serious aid and counsel.
it's not like Guts was ever going to reach "the God Hand's level of power." Whatever results from Hanarr's guidance, I think there will always be a "cost" associated with using the armor, and that Guts will have to contend with the Beast. That cost, skirting danger with every use, it's what makes the armor cool, to me.
Yeah I have to agree, there isn't going to be some easy way out of the danger the armor poses, and Guts is never going to be stronger than a member of the God Hand. What makes Berserk cool in the first place is that Guts manages to win despite being underpowered against the enemies he fights. He grits his teeth and crawls in the mud, bloody and broken, and against all odds he pulls through. That's not going to change.
Besides, let's not forget that the Berserk's armor was originally worn by Gaiseric, who knew Hanarr well. And we all know how that ended up.