Finishing advice for Tassie oak built-in bench top

So I have abandoned the idea of using pine panels as a suitable top for my living room built-in, and purchased some of laminated Tassie oak panels. I am planning to join them end to end with a biscuit joiner and glue before attaching them to the cabinets. I will then fill any joins and cracks/defects with hardwood coloured timbermate. To finish it I was going to water down some more timbermate to use as a grain filler before sanding back and staining with a wattyl traditional craftsman stain/dye in teak colour. The final finish will be with 3/coats of minwax water based polyurethane.
Can anyone see any problems with this sequence? Any advice will be appreciated as this is my first woodworking project and I am open to all ideas.
Cheers.