I'm going to go on record and say that I agree that the trailer was not an ideal way of starting this mystery. If it wasn't me the did it, someone else would've eventually. I would give it a day tops. I'm curious to know what Frontier had originally planned.
If it ended up as some new discovery by Professor of Author-insert-controlling-the-narrative Palin. Where he gives the co-ordinates and system out after a CG to collect Soontill relics. Then I think we would be overall more disappointed than we are now. I would prefer subverting Frontiers intentions by dissecting a trailer to that any day. The "NPC" assistance is the most worst method for solving mysteries, just boils things down to CGs and Galnet articles.
Frontier needs to create puzzles and mysteries that are solved by the players. Triangulating positions based on star maps, analyzing audio, subjecting things to certain tests(UP scanning). I should point out that they are a company and can actually hire someone to do that, create puzzles for players to solve.