Suggestions include the policing of trains on football days, an on-board trolley service, the restoration of Barrhill station and the building of a station at Glenluce Abbey.
Consultants Deltix Transport were drafted in to assess the sustainability of the line.
And in a report released yesterday, they claim the line currently has the most complex and irregular timetable in Scotland, and that once Stena move from Stranraer, attention should be focused on attracting leisure tourists instead of only "through-traffic".
Deltix say the line has potential for bringing day-trippers to Stranraer from the central belt given its "competitive" two-hour journey, along with the potential to provide a green corridor to Glasgow.
The report adds: "Timetabled ferry connections are relatively good, particularly from Belfast and on Mondays to Fridays."
But it also points out that due to low-cost flights between Glasgow and Belfast, the train service is poorly used with an average of just 21 people per train, with 24 trains per day using the line. This means that out of a 3,480 seating capacity, just 500 are used - and ticket prices are perceived as expensive.
In order to regenerate the line, Deltix suggest marketing its plus points. These include Stranraer as Britain's oldest working harbour station; Girvan being the only station with a surviving art-deco station building and Barrhill being Scotland's last rural station with a staffed signal box.
It also suggests a timetable revamp would need to allow for at least three fast through trains each way Monday to Saturday between Glasgow and Stranraer and there is even talk of a through train connecting Edinburgh to Stranraer, given Edinburgh's Botanic Garden link with Logan Botanic Garden in the Rhins.
An hourly service between Girvan and Ayr "would be sought" but Deltix identified that a running time of 27 minutes between the two towns would not allow for that - until infrastructure investment could be confirmed.
Partnerships in other part of Scotland have proved fruitful in improving user numbers on train services and Deltix have put forward an idea to have SAYLSA (Stranraer to Ayr Line Support Association) form a partnership body or bring in a separately constituted rail partnership encompassing key stakeholders.
There has been a revival of interest in using the line for freight due to climate change, rising fuel prices and supermarket produce becoming more dependent on wider transport.
The line could take advantage of this, say Deltix, but it would require significant infrastructure works such as strengthening bridges and raising tunnel heights.
Deltix concluded that the line is currently being neglected due to a lack of promotion and could be upgraded significantly.
Deltix say: "Research should be undertaken into the opportunities for access to key visitor attractions. Other consideration should be given to tackling the litter problem at Maybole Station and more competitive fares."
Since the line opened in 1877, its primary function was a link between ferries and Glasgow. The report will be considered at a SWestrans meeting today.