Should the European Rugby Cups, be shared between the remaining sides, in each trophy?

Should the European Rugby cups, be shared between the remaining sides, in each trophy?
Should the trophies be declared null and void, or played behind closed doors, just postponed or even shared between the remanaing sides?
In the European Rugby Champions Cup, the remaining games are
Exeter Chiefs v Northampton Saints, 
Clermont v Racing 92, 
Leinster v Saracens, 
Toulouse v  Ulster.
In the European Rugby Challenge Cup, the remaining quarter-final games are 
Bordeaux Bègles v  Edinburgh, 
Toulon v Scarlets, 
Leicester Tigers v Castres, 
Bristol Bears v Dragons.
The old five nations and home nations championships used to be shared between joint winners, when teams were level on games won and drawn. Back in 1988 the five nations, was shared between Wales and France. The 1986 trophy was shared between Scotland and France. In 1973 the trophy was shared between all five nations.
The Scottish Football League was shared between Dumbarton FC and Glasgow Rangers in 1891.
So is 8 teams left in each rugby trophy too many teams to share the trophies?