440 chainstays are a little long. It says there's room for a 2.75 29 tire. Maybe that means a 2.6 will fit.
68.5 head tube angle is a couple degrees steep. And I question that number based on the wheelbase.
Reach is a little short and so is the wheelbase. 473 reach for a XL might help with an angleset. 1186 XL wheelbase.
Size up if you're close to the top of a size range. Or just size up.
In Singapore your terrain many make some of these considerations less important.
They ship a quality frame, ime.

Compare it to this 'new' frame. Comes as a complete for a little more.
Stoic 2 | CANYON DE

 

I always wonder about a company that doesn't tout the weight of their frame. Especially a TI frame. TI frames can be the best of the best, or a dead horse in how they ride and feel.
If you decide to go with Titanium, I would recommend having a custom frame built from Waltly via Aliexpress or Alibaba. You can purchase one of their production frames, or you can dictate the frame's geometry to your specific body and needs.
Otherwise I recommend going with a carbon frame.

 

Actually I have been reading that steel frames have not been the compliant springy ride they were touted to be since the new steel regulations in 2010.

So I'm quite curious about this steel/ti thing and want something relatively affordable but quirky for commuting. I have tried a soma wolverine and a older surly for a bit but not for long enough I reckon. But I feel tyre pressure matters more than frame material in those instances as the tyres were pumped tock solid...

Someone in singletracks bought a viajero and weighed it at about 1.8kg. most steel frames seem in the range of 2.7-3kg. I wonder if frame weight might be correlated to ride quality since more material used possibly points to bigger and stiffer tubes?

Wouldn't mind a on one big dog if I could get one at the launch price of 160gbp but I think that's probably impossible now being priced as much as the ti viajero.

 

I also think regs get steel bikes built for standard 300lbs. Unless custom.
This Taiwan frame company has been around a long time. Maybe not too far.
They mention custom. 3Al 2.5V Ti Titanium MTB Frame (oraeng-tw.com)
They list a 27.5+ frame that would be in the 29 size range. Titanium MTB Frame 17-MB-301 (oraeng-tw.com)
Custom may allow them to use the Stoic specs.