iExpense Allocations: Concatenated Segments

Greetings

Is it possible to concatenate the segments (combination LOV UI)  in the Expense Allocations Tab and show it as a old style Key Flexfield?

We are noticing that charging expenses to a different company and cost center is actually slowing down the expense entry (cannot use saved allocations) and also each segment is validated after tab out of that field, causing more delay.

We would like to ask if it is a possibility to show the segments as one combination LOV thus making entry and validation easier.

Thank you