[A OR B OR C] AND [D OR E OR F]

is equivalent to, without brackets

A AND D OR A AND E OR A AND F OR B AND D OR B AND E OR B AND F OR C AND D OR C AND E OR C AND F
So this is equivalent to
(A+B+C)*(D+E+F)=AD + AE + AF + BD + BE + BF + CD + CE + CF
Right?

Yep. "AND" is equivalent to ...

are we going to get 'brackets' then to allow AND to be evaluated after OR subclauses?

As far as I can tell, there's no need for this, as any logical set of conditions should be possible to express in a clause-less, standard-boolean-precedence form.

For example,

[A OR B OR C] AND [D OR E OR F ...

Fixed for the next release (I hope).

Being said person that was royally confused on Reddit, this pleases me greatly! Good job!

(This also means that the update will break all my train stations, as I finally figured out how to make them work like I wanted with the "old" logic pattern, but that is ...