Hi Sippin37. I wouldn't worry about this beer yet. Keep in mind that most of the Belgian Lambic beers you may have tried spend 1-3 years in oak before being bottled, and then also have a long transit and time on the shelf in the US. The blend does have Saccharomyces, brett, lacto and pedio, so it does cover the bases of lambic organisms. But the complexity of organisms is way lower than you'd find in lambics. 65F is a totally fine temp for this blend.
At this point in a lambic-type fermentation, normal beer yeast would be dominant. Over the next 6-12 months brett and lactic acid bacteria should take over, producing more funk and acidity. I don't think it would hurt your beer to add dregs from some of your favorite sours but don't be concerned about no acidity at this point. You should expect to let the beer go for at least 6 months, but a year or more is very reasonable for aging time of a pitched yeast lambic-inspired beer.