Before them coming into F1 it was normal practise that the first days on the track were littered by mechanical glitches and long pauses with a lot of bricolage...especially for the minnows in F1...
I remember ATS driver Manfred Winkelhock solving one electrical failure on their first proper test with the BMW turbo ,as he was the only professional car electrician
in the team!!!! that test was in Brazil btw...

with the budgets going down it is completely normal that we will face more of these glitches make it to the track,no question.
From now on experience and expertise is king more than ever.You need to have a good understanding of the implications plus detail knowledge in one person,whereas beforehand this could be split into several persons contributing to the master.