Bruno was the SFX guy first and foremost. Naturally, he nailed that part. Running overbudget is more of a producer issue that plagues from SFX heavy production. Things need to be readjusted and fine-tuned - not every pre-planned sequence works out as expected - that eats up time and money real fast - especially when the director is one the boys. CGI was a game changer in this regard because it allowed to keep things as close to pre-vis as possible but also change things up when necessary.