Miami TRACON controller reported a problem with VFR aircraft flying too close to final and requestin...

Narrative:

I was working 1Z and observed a fast moving; rapidly descending VFR northwest of fxe; southeast bound out of 066. I tagged the target ''watch'' and backsplatted to the busy fll feeder and final controller. Final control had to break aircraft X out wider in his downwind; then turn the aircraft in tighter than should have been needed for the approach because this VFR blew through both finals into hwo. Upon calling the tower; hwo informed us the callsign of this VFR was aircraft Y and was an experimental. VFR's should not be allowed to create such an unsafe situation flying through both finals like this; especially when they're busy.fll airport is the 19th busiest airport in the USA; and one of the top 3 fastest growing; averaging 8% growth each of the last 5 years. Fll has a basic class C airspace surrounding it; that is beyond out of date and unable to aid in the safety of its aircraft on the finals. Planes inbound to each of their parallel runways are not offered any sort of protection until within 5 miles of the field; which allows several dozen vfrs each day to climb; descend; and transition across each final; without ATC advisories creating a very dangerous; unsafe; and hazardous situation in the skies above. The fll class C is inadequate; and out of date; and needs a major airspace change around it; whether a bigger charlie; or a full blown class B before it's too late.

Original NASA ASRS Text

Title: Miami TRACON Controller reported a problem with VFR aircraft flying too close to final and requesting an airspace change.

Narrative: I was working 1Z and observed a fast moving; rapidly descending VFR northwest of FXE; southeast bound out of 066. I tagged the target ''watch'' and backsplatted to the busy FLL feeder and final controller. Final control had to break Aircraft X out wider in his downwind; then turn the aircraft in tighter than should have been needed for the approach because this VFR blew through both finals into HWO. Upon calling the Tower; HWO informed us the callsign of this VFR was Aircraft Y and was an experimental. VFR's should not be allowed to create such an unsafe situation flying through both finals like this; especially when they're busy.FLL airport is the 19th busiest airport in the USA; and one of the top 3 fastest growing; averaging 8% growth each of the last 5 years. FLL has a basic Class C Airspace surrounding it; that is beyond out of date and unable to aid in the safety of its aircraft on the finals. Planes inbound to each of their parallel runways are not offered any sort of protection until within 5 miles of the field; which allows several dozen VFRs each day to climb; descend; and transition across each final; without ATC advisories creating a very dangerous; unsafe; and hazardous situation in the skies above. The FLL Class C is inadequate; and out of date; and needs a major airspace change around it; whether a bigger Charlie; or a full blown Class B before it's too late.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1576577
Time
Date	201809
Local Time Of Day	1201-1800
Place
Locale Reference	MIA.TRACON
State Reference	FL
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Aircraft 2
Make Model Name	RV-7
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	None
Flight Plan	VFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 2
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Miami TRACON controller reported a problem with VFR aircraft flying too close to final and requesting an airspace change.