What has happened to Bullard is he injured or looking like an expensive bust

I don't think he's expensive.   I believe he's still on his rookie contract that looks like it runs out next year.  (All that said, I don't expect him to last past his rookie contract.)

https://overthecap.com/player/jonathan-bullard/4785/

Current Contract

Year	Age	Base Salary (Guaranteed)	Bonuses				Cap Number	Cap %		Dead Money & Cap Savings Cut (pre-June 1) Cut (post-June 1) Trade (pre-June 1) Trade (post-June 1) Restructure Extension
			Prorated	Roster	Workout	Other
2016	23	$450,000	$206,630	$0	$0	$0	$656,630	0.4%
2017	24	$599,000	$206,630	$0	$0	$0	$805,630	0.5%
2018	25	$718,000	$206,630	$0	$0	$0	$924,630	0.5%		$413,260	$511,370
2019	26	$820,000	$206,630	$0	$0	$0	$1,026,630	0.5%		$206,630	$820,000
Total		$2,587,000	$826,520	$0	$0	$0	$3,413,520

When I stated expensive I meant where he was drafted. I thought he was a 2nd round pick but he was drafted in the 3rd round. 

I expected him to win the end position opposite Hicks although it looks like we play in nickel a lot with 2 DL, 4 LB’s and 5DB’s unless I’m mistaken. That would drop his potential playing time I suppose. 

We certainly want to see him develop into a starter but at this point it seems his career will be spent as a backup player.