It's a solid team with everyone up and going. The team that has been on the court without Penney nor a contributing second import, has been mediocre at best, talent-wise.
There are only 3 guys in the rotation who are a real threat from deep (Bruton, Forman, Ronaldson) and one who is an ok threat (Abercrombie). None of them have been really firing as you point out. You could make a case for Webster playing more minutes, but he is very inconsistent from deep.
That lack of shooting makes it very hard to spread the floor and create room in the lane, and being 4-5 at this stage is a good effort, particularly given that Bruton is well off top fitness and being asked to do way too much.
As a comparison, the teams that have made recent grand finals have rosters full of perimeter threats: 09 South 7, Melbourne 7; 08 Melbourne 6.5, Sydney 7; 07 Brisbane 7, Melbourne 6.5.
If you look at other teams this year Perth have 7 or 8 on current form, as do the Gold Coast. Wollongong and Adelaide have 6 or 7, Townsville have 7.
Once the Breakers get a new import who can shoot and Rillie/Penney into the lineup it will be a lot easier to score points, and much easier for Ronaldson and Rickert to work inside, and Bruton, Abercrombie, Penney and the import to penetrate. But the simple fact in pro basketball is good shooters have to shoot their open shots.