Budiansky had little to do with that on the cartoon side at least. He wrote the basic background and the first half-ish of the Marvel comic run. He had nothing to do with the cartoon or the movie. The movie was written as a draft by season 1-2 editor and script doctor Ron Friedman and then given a once-over/re-work by the series' main story editor, Flint Dille, and brand creative director Jay Bacal.
Budiansky was responsible for his share of TF death, but that was mostly in the form of the comics' Underbase saga. And then he kind of got overshadowed by the levels of sustained brutality that Simon Furman put the characters through in the late marvel run and especially the short-lived G2 series.
Granted, the Underbase storyline was pretty bloody. Issue #50 ("Dark Star") stands as the highest bodycount of any single issue or episode of the franchise. The confirmed casualty list from that episode stands at:
- All 5 Aerialbots
- All 6 Seacons
- All 5 Predacons
- All 5 Technobots
- All 5 Terrorcons
- All 5 Dinobots
- Hound
- Bluestreak
- Mirage
- Hoist
- Brawn
- Gears
- Goldbug (Bumblebee's rebuilt form)
- Jazz
- Jetfire
- Blaster
- The 5 Throttlebots
- Thundercracker
- Skywarp
- Soundwave along with Ratbat, Laserbeak and Buzzsaw
- All 3 Decepticon triple-changers (Astrotrain, Blitzwing, and Octane)
- Omega Supreme
- Starscream
It's also hinted that several other characters who later turn up dead were killed here such as most of the other combiner squads, the other seeker jets, Powerglide, Perceptor, and others. The reasoning was as it was for most Transformer deaths of that time, Hasbro wanted them to only showcase the characters with current toys, and the most convenient way to clear story space was just to gut the cast of anyone who was no longer on store shelves.
Also Budiansky has admitted that he really had no idea that the Transformers had taken hold in pop culture like it had until the late 90s and early 2000s when he googled his own name and found significant, ongoing discussion of the franchise online. He also has talked about being generally surprised by how seriously and fervently some fans take the characters. To him it was just a job that he did and promptly forgot about when he moved onto another gig (he was a house writer for Marvel and worked on Ghost Rider and Spider-Man among other things)
Now if you'll excuse me, I'm probably going to re-read the Marvel run again because I don't remember half those deaths.